{"id":13519,"date":"2023-01-01T13:15:26","date_gmt":"2023-01-01T07:45:26","guid":{"rendered":"https:\/\/envisionmathanswerkey.com\/?p=13519"},"modified":"2024-01-02T15:11:06","modified_gmt":"2024-01-02T09:41:06","slug":"envision-math-common-core-grade-2-answer-key-topic-3","status":"publish","type":"post","link":"https:\/\/envisionmathanswerkey.com\/envision-math-common-core-grade-2-answer-key-topic-3\/","title":{"rendered":"enVision Math Common Core Grade 2 Answer Key Topic 3 Add Within 100 Using Strategies"},"content":{"rendered":"

Go through the\u00a0enVision Math Common Core Grade 2 Answer Key<\/a>\u00a0Topic 3 Add Within 100 Using Strategies<\/strong>\u00a0regularly and improve your accuracy in solving questions.<\/p>\n

enVision Math Common Core 2nd Grade Answers Key Topic 3 Add Within 100 Using Strategies<\/h2>\n

Essential Question:<\/strong>
\nWhat are strategies for adding numbers to 100?
\n\"Envision<\/p>\n

enVision STEM Project: Earth Changes and Addition Strategies<\/strong>
\nFind Out Find and share books about how the Earth changes. Talk about changes that people can see, hear, and feel. Talk about changes that people cannot see happening.
\nJournal: Make a Book Show what you learn in a book. In your book, also:<\/p>\n

    \n
  • Write new science words you learn. Draw pictures that help show what the words mean.<\/li>\n
  • Write new math words you learn. Draw pictures that help show what the words mean.<\/li>\n<\/ul>\n

    Review What You Know<\/strong><\/p>\n

    Vocabulary<\/strong>
    \nQuestion 1.
    \nDraw a circle around each even number. Use cubes to help.
    \n15
    \n7
    \n14
    \n2
    \n19
    \n18
    \nAnswer:<\/p>\n

    In the given numbers 14, 2 and 18 are the even numbers.know draw a circle around the 14, 2 and 18.<\/p>\n

    \"Envision<\/p>\n

    Question 2.
    \nDraw a square around each odd number. Use cubes to help.
    \n12
    \n3
    \n6
    \n17
    \n11
    \n4
    \nAnswer:<\/p>\n

    In the given numbers 3,17 and 11 are the odd numbers. Know draw the square around the 3, 17 and 11.<\/p>\n

    Question 3.
    \nComplete the bar diagram to show the sum of 3 + 5.
    \n\"Envision
    \nAnswer:
    \n\"Envision-Math-Common-Core-2nd-Grade-Answer-Key-Topic-3-Add-Within-100-Using-Strategies-2\"<\/p>\n

    In the above diagram they have given a 3 dots on the left side. Know we want to draw 5 dots on the right side. By adding both sides of the dots wet get 3 + 5 = 8<\/p>\n

    Arrays<\/p>\n

    Write an equation to show the number of circles in each array.
    \nQuestion 4.
    \n\"Envision
    \nBy rows
    \n_______ + _______ = _______
    \nAnswer:<\/p>\n

    Given,
    \nTotal number of rows = 2
    \nEach row contains 4 circles.
    \n4 + 4 = 8<\/p>\n

    \"Add<\/p>\n

    Question 5.
    \n\"Envision
    \nBy columns
    \n_______ + _______ = _______
    \nAnswer:
    \nGiven that,
    \nTotal number of columns = 3
    \n<\/span>Each column contains 3 circles.
    \n3 + 3 + 3 = 9<\/p>\n

    Math Story<\/strong>
    \nQuestion 6.
    \nJoe has 5 apples. He picks 3 more apples. How many apples does Joe have now?
    \n_______ apples
    \nDoes Joe have an even or an odd number of apples?
    \n_________ number
    \nAnswer:
    \nGiven that
    \nTotal number of apples at Joe = 5
    \nJoe picks more apples = 3
    \nTotal number of apples near Joe = 5 + 3 =8
    \nJoe has an even number of apples.<\/p>\n

    Pick a Project<\/strong><\/p>\n

    PROJECT \u0417\u0410
    \nHow far would you travel to cheer for your team?
    \nProject: Make a Map to the Game
    \n\"Envision<\/p>\n

    PROJECT \u0417B
    \nWhat are some important things to do at the airport?
    \nProject: Write a List of Air Travel Tasks
    \n\"Envision<\/p>\n

    PROJECT 3C
    \nHow many Olympic Games have there been?
    \nProject: Create an Olympics Poster
    \n\"Envision<\/p>\n

    3-ACT MATH PREVIEW<\/strong><\/p>\n

    Math Modeling
    \nPiled Up
    \n\"Envision<\/p>\n

    Lesson 3.1 Add Tens and Ones on a Hundred Chart<\/h3>\n

    Solve & Share<\/strong>
    \nHow can you use the hundred chart to help you find 32 + 43? Explain.
    \nWrite an equation to show the sum.<\/p>\n

    I can … add within 100 using place-value strategies and properties of operations.
    \n\"Envision
    \n______ + _______ = ________<\/p>\n

    Visual Learning Bridge<\/p>\n

    Convince Me! Max says that to find 54 + 18 on a hundred chart, you can start at 54, move down 2 rows, and move back 2 spaces. Do you agree? Explain.<\/p>\n

    Guided Practice<\/strong><\/p>\n

    Add using the hundred chart. Draw arrows on the chart if needed.
    \n\"Envision
    \nQuestion 1.
    \n17 + 32 = ________
    \nAnswer:
    \nWe are using the hundred chart to find the sum of 17 + 32
    \nIn the hundred charts we start at 17 moves down to 3 rows and move front to 2 spaces then we get 49
    \n17 + 32 = 49
    \nQuestion 2.
    \n28 + 21 = ________
    \nAnswer:
    \nWe are using the hundred chart to find the sum of 28 + 21
    \nIn the hundred charts we start at 28 move down to 2 rows and move front to 1 space then we get 49.
    \n28 + 21 = 49
    \nQuestion 3.
    \n________ = 19 + 20
    \nAnswer: we are using a hundred charts to find the sum of 19 + 20
    \nIn the hundred charts we start at 19 moves down to 2 rows then we get 39.
    \n39 = 19 + 20
    \nQuestion 4.
    \n18 + 8 = ________
    \nAnswer:
    \nWe are using the hundred chart to find the sum of 18 + 8
    \nIn the hundred charts, we start at 18 moves down to 1 row and back to 2 space then we get 26
    \n18 + 8 = 26<\/p>\n

    Independent Practice<\/strong><\/p>\n

    Add using the hundred chart.
    \n\"Envision
    \nQuestion 5.
    \n33 + 9 = ________
    \nAnswer:
    \nWe are using the hundred chart to find the sum of 33 + 9
    \nIn the hundred charts we start at 33 down to 1 row and move back to 1 space then we get 42
    \n33 + 9 = 42<\/p>\n

    \"Add
    \nQuestion 6.
    \n________ = 12 + 73
    \nAnswer:
    \nWe are using the hundred chart to find the sum of 12 + 73
    \nIn the hundred charts we start at 12 down to 7 rows and move front to 3 Space we get 85
    \n85 = 12 + 73
    \nQuestion 7.
    \n38 + 21 = ________
    \nAnswer:
    \nWe are using the hundred chart to find the sum of 38 + 21
    \nIn the hundred charts we start at 38 down to 2 rows and front to 1 space then we get 59
    \n38 + 21 = 59
    \nQuestion 8.
    \n56 + 42 = ________
    \nAnswer:
    \nWe are using the hundred chart to find the sum of 56 + 42
    \nIn the hundred charts we start at 56 down to 4 rows and front to 2 spaces then we get 98
    \n56 + 42 = 98
    \nQuestion 9.
    \n________ = 47 + 28
    \nAnswer:
    \nWe are using the hundred chart to find the sum of 47 + 28
    \nIn the hundred charts, we start at 47 down to 3 rows and back to\u00a0 2 spaces then we get 75
    \n75 = 47 + 28
    \nQuestion 10.
    \n39 + 17 = ________
    \nAnswer:
    \nWe are using the hundred chart to find the sum of 39 + 17
    \nIn the hundred charts, we start at 39 down to 2 rows and back to 3 spaces then we get 56
    \n39 + 17 =56
    \nQuestion 11.
    \n________ = 61 + 19
    \nAnswer:
    \nWe are using the hundred chart to find the sum of 61 + 19
    \nIn the hundred charts, we start at 61 and down to 2 rows and back to 8 space then we get 89
    \n89 = 61 + 19<\/p>\n

    Question 12.
    \nHigher Order Thinking<\/strong> Write the digit that makes each equation true.
    \n\"Envision
    \nAnswer:
    \n7 + 83 = 90
    \nThe number 7 makes the equation true.
    \n34 + 25 = 57
    \nThe digit 5 makes the equation true.
    \n16 + 52 = 67
    \nThe digit 1 makes the equation true.
    \n62 + 21 = 83
    \nThe digit 2 makes the equation true.
    \nProblem Solving<\/strong><\/p>\n

    Use Tools Use the hundred chart to solve the problems.
    \n\"Envision
    \nQuestion 13.
    \nSara has 48 buttons. Luis has 32 buttons. How many buttons do they have in all?
    \n________ buttons
    \nAnswer:
    \nGiven that,
    \nTotal number of buttons at Sara = 48
    \nTotal number\u00a0 buttons at Luis = 32
    \nThe total number of buttons at both of them have = 48 + 32
    \nBy using a hundred charts the sum of 48 + 32 is
    \nIn the hundred charts Start at 48 and down to 3 rows and front to 2 spaces then we get 80.
    \n48 + 32 = 80
    \nQuestion 14.
    \nMika had 70 buttons. Then she found 19 more buttons. How many buttons does Mika have now?
    \n_______ buttons
    \nAnswer:
    \nGiven that,
    \nTotal number of buttons at Mika\u00a0 = 70
    \nShe found more buttons = 19
    \nTotal number of buttons with Mike = 70 + 19
    \nBy using the hundred chart we find the sum of 70 + 19
    \nIn the hundred chart, we start at 70 then down to 2 rows and back to 1 space then we get
    \nQuestion 15.
    \nHigher Order Thinking<\/strong> Write the steps you take to add 43 and 39 on a hundred chart.
    \nAnswer:
    \nWe are using the hundred chart to find the sum of 43 and 39
    \nIn the hundred charts, we start at 43 and down to 4 rows and back to 1 space then we get 82
    \n43 + 39 = 82
    \nQuestion 16.
    \nAssessment Practice<\/strong> which has a sum of 35? Choose all that apply.
    \n\u2610 15 + 20
    \n\u2610 16 + 19
    \n\u2610 20 + 15
    \n\u2610 30 + 15
    \nAnswer:
    \n15 + 20 has a sum of 35.
    \n16 + 19 has a sum of 35
    \n20 + 15 has a sum 0f 35<\/p>\n

    Lesson 3.2 Add Tens and Ones on an Open Number Line<\/h3>\n

    Solve & Share<\/strong>
    \nHow can you use the open number line to find 35 + 24?
    \nWrite an equation to show the sum. Explain your work.<\/p>\n

    I can … use an open number line to add tens and ones within 100.
    \n\"Envision<\/p>\n

    Visual Learning Bridge
    \n\"Envision<\/p>\n

    Convince Me! Explain how you can use an open number line to find 56 + 35.<\/p>\n

    Guided Practice<\/strong><\/p>\n

    Use an open number line to find each sum.
    \nQuestion 1.
    \n59 + 24 = _________
    \n\"Envision
    \nAnswer: 59 + 24 = 83
    \nQuestion 2.
    \n47 + 25 = _________
    \n\"Envision
    \nAnswer:
    \nFirst, draw a line.
    \nRepresent the numbers on the line.
    \nThe first number is 47 and counts by 20 then it gets 67 and hump 5 then we get 72.
    \nCount the numbers and draw an arrow
    \n47 + 25 = 72
    \n<\/span>\"Envision<\/p>\n

    Independent Practice<\/strong><\/p>\n

    Use an open number line to find each sum.
    \nQuestion 3.
    \n34 + 15 = ________
    \n\"Envision
    \nAnswer:
    \nFirst, draw the line.
    \nRepresent the numbers on the line.
    \nThe first number is 34 and counts by 10 then it gets 44 and 5 then we get 49.
    \nCount the numbers and draw an arrow.
    \n34 + 15 = 49
    \n<\/span>\"Envision<\/p>\n

    Question 4.
    \n34 + 46 = ________
    \n\"Envision
    \nAnswer:
    \n34 + 46 = 80
    \nFirst, draw the Line.
    \nRepresent the number on the line.
    \nThe first number is 34 and counts by 20 then it gets 54 and counts again 20 then it gets 74 and jump to 6 then it gets 80.
    \nCount the numbers and draw an arrow
    \n\"Envision-Math-Common-Core-2nd-Grade-Answer-Key-Topic-3-Add-Within-100-Using-Strategies-18\"
    \nQuestion 5.
    \n16 + 28 = _________
    \n\"Envision
    \nAnswer:
    \n16 + 28 =44
    \n<\/span>First, draw the Line.
    \nRepresent the number on the line.
    \nThe first number is 16and counts by 10 then it gets 26 and jumps to 2 then it gets 28.
    \n\"Envision-Math-Common-Core-2nd-Grade-Answer-Key-Topic-3-Add-Within-100-Using-Strategies-18
    \nCount the numbers and draw an arrow.
    \nQuestion 6.
    \n59 + 26 = ________
    \n\"Envision
    \nAnswer: 59 + 26 = 85
    \nFirst draw the Line.
    \nRepresent the number on the line.
    \nThe first number is 59 and counts by 20 then it gets 79 and jumps to 6 then it gets 85.
    \nCount the numbers and draw an arrow.
    \n\"Envision-Math-Common-Core-2nd-Grade-Answer-Key-Topic-3-Add-Within-100-Using-Strategies-18
    \nQuestion 7.
    \nNumber Sense<\/strong> Matt found 55 + 28 using the open number line below. Is his work correct? Explain.
    \n\"Envision
    \nAnswer: 55 + 28 = 83<\/p>\n

    Problem Solving<\/strong><\/p>\n

    Use the open number line to solve each problem below.
    \nQuestion 8.
    \nReason There are 24 apples in a basket. There are 19 apples on a tray. How many apples are there in all?
    \n\"Envision
    \n_________ apples
    \nAnswer: Apples in a basket = 24
    \nApples in a tray = 19
    \nTotal number of apples = 24 + 19 = 43
    \nUsing the number line.
    \nFirst, draw the Line.
    \nRepresent the number on the line.
    \nThe first number is 24 and counts by 10 then it gets 34 and jumps to 9 then it gets 43.
    \nCount the numbers and draw an arrow.
    \n\"Envision<\/p>\n

    Question 19.
    \nReason Jamie has 27 more berries than Lisa. Lisa has 37 berries. How many berries does Jamie have?
    \n\"Envision
    \n_________ berries
    \nAnswer:
    \nLisa has berries = 37
    \nJamie has berries = 27 berries more than Lisa
    \nJamie has berries = 37 + 27 =64
    \nFirst draw the Line.
    \nRepresent the number on the line.
    \nThe first number is 37 and counts by 20 then it gets 54\u00a0 and jumps to 9 then it gets 80.
    \nCount the numbers and draw an arrow.
    \n\"Envision<\/p>\n

    Question 10.<\/span><\/p>\n

    Higher Order Thinking<\/strong> Use two different number lines to show that 34 + 23 has the same value as 23 + 34.
    \n\"Envision
    \n\"Envision
    \nAnswer:
    \n34 + 23 = 57
    \nFirst, draw the Line.
    \nRepresent the number on the line.
    \nThe first number is 34 and counts by 20 then it gets 54 and jumps to 3 then it gets 57.
    \nCount the numbers and draw an arrow.
    \n\"Envision
    \n23 + 34 = 57
    \nFirst, draw the Line.
    \nRepresent the number on the line.
    \nThe first number is 23 and counts by 30 then it gets 53 jumps to 3 then it gets 57.
    \nCount the numbers and draw an arrow.
    \n\"Envision<\/p>\n

    Question 11.
    \nAssessment Practice<\/strong> Use the numbers on the cards. Write the missing numbers under the number line to show how to find the sum.
    \n\"Envision
    \n43 + 25 = _________
    \nAnswer:
    \n43 + 25 = 68
    \n\"Envision-Math-Common-Core-2nd-Grade-Answers-Topic-3-Add-Within-100-Using-Strategies-20\"<\/p>\n

    Lesson 3.3 Break Apart Numbers to Add<\/h3>\n

    Solve & Share<\/strong>
    \nJosh has 34 cans to recycle. Jill has 27 cans. How many cans do they have in all? Solve any way you choose. Use drawings and equations to explain your work.
    \nI can … break apart numbers into tens and ones to find their sum.
    \n\"Envision<\/p>\n

    Visual Learning Bridge
    \n\"Envision<\/p>\n

    Convince Me! Explain how you can break apart 28 to find 33 + 28.<\/p>\n

    Guided Practice<\/strong><\/p>\n

    Break apart the second addend to find the sum. Show your work. Use an open number line to help.
    \nQuestion 1.
    \n\"Envision<\/p>\n

    Independent Practice<\/strong><\/p>\n

    Break apart the second addend to find the sum. Show your work. Draw an open number line to help.
    \nQuestion 2.
    \n42 + 16 = ________
    \nAnswer:
    \n42 + 16 =
    \n42 + 10 + 6
    \n52 + 6 = 58
    \nFirst draw the Line.
    \nRepresent the number on the line.
    \nThe first number is 42 and counts by 10 then it gets 52 and jumps to 6 then it gets 58.
    \nCount the numbers and draw an arrow.
    \n\"Envision-Math-Common-Core-2nd-Grade-Answer-Key-Topic-3-Add-Within-100-Using-Strategies-18
    \nQuestion 3.
    \n<\/span>36 + 44 = ________
    \nAnswer:
    \n36 + 44
    \n36 + 40 + 4
    \n76 + 4 = 80
    \nFirst draw the Line.
    \nRepresent the number on the line.
    \nThe first number is 36 and counts by 20 then it gets 56 and counts again by 20 ten we get 76 and jump to 4 then it gets 80.
    \nCount the numbers and draw an arrow.
    \n\"Envision-Math-Common-Core-2nd-Grade-Answer-Key-Topic-3-Add-Within-100-Using-Strategies-18
    \nQuestion 4.
    \n41 + 37 = ________
    \nAnswer:
    \n41 + 37
    \n41 + 30 + 7
    \n71 + 7 = 78
    \nFirst draw the Line.
    \nRepresent the number on the line.
    \nThe first number is 41 and counts by 30 then it gets 71 and jumps to 7 then it gets 78.
    \nCount the numbers and draw an arrow.
    \n\"Envision-Math-Common-Core-2nd-Grade-Answer-Key-Topic-3-Add-Within-100-Using-Strategies-18
    \nQuestion 5.
    \n35 + 47 = ________
    \nAnswer:
    \n35 + 47
    \n35 + 40 + 7
    \n75 + 7 = 82
    \nFirst draw the Line.
    \nRepresent the number on the line.
    \nThe first number is 35 and counts by 40 then it gets 75 and jumps to 7 then it gets 82.
    \nCount the numbers and draw an arrow.
    \n\"Envision-Math-Common-Core-2nd-Grade-Answer-Key-Topic-3-Add-Within-100-Using-Strategies-18
    \nQuestion 6.
    \n32 + 28 = ________
    \nAnswer:
    \n32 + 28
    \n32 + 20 + 8
    \n52 + 8 = 60
    \nFirst draw the Line.
    \nRepresent the number on the line.
    \nThe first number is 32 and counts by 20 then it gets 52 and jumps to 8 then it gets 60.
    \nCount the numbers and draw an arrow.
    \n\"Envision<\/p>\n

    Question 17.
    \n48 + 27 = ________
    \nAnswer:
    \n48 + 27
    \n48 + 20 + 7
    \n68 + 7 = 75
    \nFirst draw the Line.
    \nRepresent the number on the line.
    \nThe first number is 48 and counts by 20 then it gets 68 and jumps to 7 then it gets 75.
    \nCount the numbers and draw an arrow
    \n\"Envision-Math-Common-Core-2nd-Grade-Answer-Key-Topic-3-Add-Within-100-Using-Strategies-18
    \nQuestion 8.
    \nNumber Sense<\/strong> Write the digit that makes each equation true.
    \n\"Envision
    \nAnswer:
    \n36 + 52 = 88
    \nHere the digit 2 makes the equation true.
    \n28 + 47 = 75
    \nHere the digit 7 makes the equation true.
    \n14 + 43 = 57
    \nHere the digit 3 makes the equation true.
    \n53 + 29 = 82
    \nHere the digit 9 makes the equation true.
    \nProblem Solving<\/strong><\/p>\n

    Solve each problem. Show your work.
    \nQuestion 9.
    \nAmir planted 35 trees. Juan planted 27 trees. How many trees did they plant in all?
    \n________ trees
    \nAnswer:
    \nGiven that,
    \nTotal number of trees planted by Amir\u00a0 = 35
    \nTotal number of trees planted by Juan = 27
    \nTotal number of\u00a0 plants planted by Amir and Juan = 35 + 27 = 62
    \nQuestion 10.
    \nCarmen has 18 pennies. Patrick has 12 more pennies than Carmen. How many pennies does Patrick have?
    \n________ pennies
    \nAnswer:
    \nGiven that,
    \nTotal number of pennies at Carmen\u00a0 = 18
    \nTotal number of pennies at Patrick\u00a0 more than Carmen = 12
    \nTotal number of pennies at Patrick = 18 + 12 = 30
    \nQuestion 11.
    \nHigher Order Thinking<\/strong> Use the numbers on the cards. Use each number once to write a true equation.
    \n\"Envision
    \nAnswer:
    \nThe numbers on the card are 3, 2, 8
    \nFirst, write the 2 in the first empty box then we get 52, and write the 3 in the second empty box then we get 34
    \nBy adding 52 and 34 we get 86. Write the 8 in the third box.
    \nThe true equation is
    \n52 + 34 = 86
    \n\"Envision-Math-Common-Core-2nd-Grade-Answers-Topic-3-Add-Within-100-Using-Strategies-25\"
    \nQuestion 12.
    \nAssessment Practice<\/strong> which has a sum of 67? Choose all that apply.
    \n\"Envision
    \nAnswer:
    \n15 + 52 = 67<\/p>\n

    Lesson 3.4 Add Using Compensation<\/h3>\n

    Solve & Share<\/strong>
    \n27 + 16 = ________
    \nDraw counters on the ten frames to show each addend. Then show how you can move some counters to make it easier to find the sum. Explain your work.
    \nI can … break apart addends and combine them in different ways to make numbers that are easy to add mentally.
    \n\"Envision<\/p>\n

    Visual Learning Bridge
    \n\"Envision<\/p>\n

    Convince Me! Solve.
    \n19 + 26 = \u2610
    \nExplain how you can change the addends to make them easier to add.<\/p>\n

    Guided Practice<\/strong><\/p>\n

    Use compensation to make numbers that are easier to add. Then solve. Show your work.
    \nQuestion 1.
    \n17 + 9 = ________
    \n\"Envision<\/p>\n

    Question 2.
    \n16 + 14 = __________
    \n\"Envision
    \nAnswer:
    \n\"Envision-Math-Common-Core-2nd-Grade-Answers-Topic-3-Add-Within-100-Using-Strategies-30\"<\/p>\n

    Independent Practice<\/strong><\/p>\n

    Use compensation to make numbers that are easier to add. Then solve. Show your work.
    \nQuestion 3.
    \n33 + 19 = __________
    \nAnswer:
    \n33 + (10 + 9)
    \n(33 + 10) + 9
    \n43 + 9 = 52
    \nQuestion 4.
    \n28 + 8 = __________
    \nAnswer:
    \n28 + (2 + 6)
    \n(28 + 2) + 6
    \n30 + 6 = 36
    \nQuestion 5.
    \n27 + 36 = __________
    \nAnswer:
    \n27\u00a0 + ( 30 + 6)
    \n(27 + 30) + 6
    \n57 + 6 = 63
    \nQuestion 6.
    \nNumber Sense<\/strong> Explain how you can use compensation to make numbers that are easy to add. Solve. Show your work.
    \n28 + 37 = \"Envision
    \n______ + ______ = \"Envision
    \nAnswer:
    \n28 + 37 =
    \n28 + ( 30 + 7)
    \n(28 + 30) + 7
    \n58 + 7 = 65
    \nQuestion 7.
    \nHigher Order Thinking<\/strong> Show two different ways you could use compensation to make numbers that are easy to add. Solve. Show your work.
    \n17 + 26 = \"Envision
    \nAnswer:
    \n17 + 26
    \n17 + (20 + 6)
    \n(17 + 20) + 6
    \n37 + 6 = 43<\/p>\n

    Problem Solving<\/strong><\/p>\n

    Use compensation to make numbers that are easier to add. Then solve. Show your work.
    \nQuestion 8.
    \nExplain Bella said there is only one way to rewrite this problem to make the numbers easier to add. Is she correct? Explain. Then solve.
    \n42 + 29 = \"Envision
    \nAnswer:
    \n42 + 29
    \n42 + (20 + 9)
    \n(42 + 20) + 9
    \n62 + 9 = 71
    \nQuestion 9.
    \nVocabulary Show two different ways to use compensation to find the sum. Then solve.
    \n58 + 35 = \"Envision
    \nWhat number is close to 58 or 35?
    \nAnswer:
    \n58 + 35
    \n58 + (30 + 5)
    \n(58 + 30) + 5
    \n88 + 5 = 92
    \nQuestion 10.
    \nHigher Order Thinking<\/strong> Show two different ways to use compensation to find the sum. Then solve.
    \n37 + 16 + 5 = \"Envision
    \nAnswer:
    \n37 + (10 + 6) + 5
    \n(37 + 10) + 6 + 5
    \n47 + 6 + 5
    \n47 + 11
    \n47 +(10 + 1)
    \n(47 + 10) + 1
    \n57 + 1= 58
    \nQuestion 11.
    \nAssessment Practice<\/strong> which is equal to 42 + 18? Choose all that apply.
    \n\u2610 58
    \n\u2610 40 + 20
    \n\u2610 40 + 10 + 8
    \n\u2610 50 + 10
    \nAnswer:
    \nThe equation 40 + 20 and 50 + 10 are equal to 42 + 18<\/p>\n

    Lesson 3.5 Practice Adding Using Strategies<\/h3>\n

    Solve & Share<\/strong>
    \nTameka has 39 blocks. Kim has 43 blocks. How many blocks do they have in all? Choose any strategy. Solve. Show and explain your work.<\/p>\n

    I can … choose a strategy to help me add two-digit numbers.
    \n\"Envision
    \n_________ bolcks<\/p>\n

    Visual Learning Bridge
    \n\"Envision<\/p>\n

    Convince Me! In 66 + 25 above, why was 4 added to 66 and then subtracted from 95?<\/p>\n

    Guided Practice<\/strong><\/p>\n

    Find each sum. Use any strategy. Show your work.
    \nQuestion 1.
    \n\"Envision<\/p>\n

    Question 2.
    \n67 + 26 = ___________
    \nAnswer:
    \n67 + 26 =
    \n67 + 20 + 6
    \n87 + 6 = 93<\/p>\n

    Independent Practice<\/strong><\/p>\n

    Find each sum. Use any strategy. Show your work.
    \nQuestion 3.
    \n33 + 52 = ___________
    \nAnswer:
    \n33 + 52 =
    \n33 + 50 + 2
    \n73 + 2 = 75
    \nQuestion 4.
    \n27 + 6 = ___________
    \nAnswer:
    \n27 + 6 = 33
    \nQuestion 5.
    \n___________ = 49 + 45
    \nAnswer:
    \n49 + 45
    \n49 + 40 + 5
    \n89 + 5 = 94
    \nQuestion 6.
    \n57 + 12 = ___________
    \nAnswer:
    \n57 + 12
    \n57 + 10 + 2
    \n67 + 2 = 69
    \nQuestion 7.
    \n___________ = 63 + 20
    \nAnswer:
    \n66 + 20 = 86
    \nQuestion 18.
    \n14 + 58 = ___________
    \nAnswer:
    \n14 + 58
    \n14 + 50 + 8
    \n64 + 8 = 72
    \nQuestion 9.
    \n<\/span>45 + 55 = ___________
    \nAnswer:
    \n45 + 55
    \n45 + 50 + 5
    \n95 + 5 = 100
    \nQuestion 10.
    \n87 + 9 = ___________
    \nAnswer:
    \n87 + 9 = 96
    \nQuestion 11.
    \n19 + 61 = ___________
    \nAnswer:
    \n19 + 61
    \n19 + 60 + 1
    \n79 + 1 = 80<\/p>\n

    Number Sense<\/strong> Write the digit that makes each equation true.
    \nQuestion 12.
    \n45 + 1\u2610 = 61
    \nAnswer:
    \n45 + 16 = 61
    \nThe digit 6 makes the equation true.
    \nQuestion 13.
    \n84 = \u26108 + 56
    \nAnswer:
    \n84 = 28 + 56
    \nThe digit 2 makes the equation true.
    \nQuestion 14.
    \n3\u2610 + 19 + 56
    \nAnswer:
    \n30 + 19 + 56 = 105
    \nThe digit 0 makes the equation true<\/p>\n

    Problem Solving<\/strong><\/p>\n

    Use the hundred chart to solve each problem. Be prepared to explain your work.
    \n\"Envision<\/p>\n

    Question 15.
    \nReasoning Martin has 44 marbles. Carol has 39 marbles. Steve has 90 marbles. How many marbles do Martin and Carol have in all? Do they have more or fewer marbles than Steve?
    \n\"Envision
    \n_______ marbles
    \nCircle:
    \nmore
    \nfewer
    \nAnswer:
    \nGiven that,
    \nTotal number of marbles at Martin = 44
    \nTotal number of marbles at Carol = 39
    \nTotal number of marbles at Steve = 90
    \nTotal\u00a0 number of marbles at Martin and Carol\u00a0 = 44 + 39
    \nUsing a hundred charts find the sum of 44 + 39
    \nIn the hundred charts we start at 44 then down to 3 rows we get 74 and front to 4 space then we get 78
    \n44 + 39 = 78
    \nThey both them have fewer marbles than Steve.
    \nQuestion 16.
    \nHigher Order Thinking<\/strong> Jos\u00e9 collected 32 leaves on Saturday. On Sunday, he collected 14 more leaves than he did on Saturday.
    \nHow many leaves did Jos\u00e9 collect in all?
    \n\"Envision
    \n________ leaves
    \nAnswer:
    \nGiven that
    \nTotal number of leaves Jose collected\u00a0 on Saturday = 32
    \nTotal number of leaves Jose collected on Sunday = 14
    \nTotal number of leaves they collected = 32 + 14 = 46
    \nQuestion 17.
    \nLucita wants to use an open number line to find 53 + 18. Show how Lucita can use an open number line to find 53 + 18.
    \n\"Envision
    \nAnswer:
    \n53 + 18 = 71
    \nFirst, draw the Line.
    \nRepresent the number on the line.
    \nThe first number is 53 and counts by 10 then it gets 63 and jumps to 8 then it gets 71.
    \nCount the numbers and draw an arrow.
    \n\"Envision-Math-Common-Core-2nd-Grade-Answer-Key-Topic-3-Add-Within-100-Using-Strategies-18
    \nQuestion 18.
    \nAssessment Practice<\/strong> Maria used a hundred chart to find a sum. She started at 68. Then she moved down 3 rows and back I space. Which number did she land on?
    \nA. 88
    \nB. 97
    \nC. 98
    \nD. 99
    \nAnswer:
    \nMaria started at 68
    \nShe moved down to three rows is 98
    \nAnd she back to 1 space then his number is 97<\/p>\n

    Lesson 3.6 Solve One-Step and Two-Step Problems<\/h3>\n

    Solve & Share<\/strong>
    \nThe red team has 15 more points than the blue team. The blue team has 36 points. How many points does the red team have?
    \nChoose any strategy. Solve. Explain your work.<\/p>\n

    I can … use drawings and equations to solve one-step and two-step problems.
    \n\"Envision<\/p>\n

    Visual Learning Bridge
    \n\"Envision<\/p>\n

    Convince Me! What steps did you take to find the number of tickets Amy sold? Explain.<\/p>\n

    Guided Practice<\/strong><\/p>\n

    Solve the two-step problem. Show your work.
    \nQuestion 1.
    \nSteve read 15 books. Sam read 9 fewer books than Steve. Dixon read 8 more books than Sam. How many books did Sam read?
    \n\"Envision
    \nSam read _______ books.
    \n\"Envision-Math-Common-Core-Grade-2-Answer-Key-Topic-3-Add-Within-100-Using-Strategies-41\"
    \nsam read 6 books.<\/p>\n

    How many books did Dixon read?
    \n\"Envision
    \nDixon read _______ books.
    \n\"Envision-Math-Common-Core-Grade-2-Answer-Key-Topic-3-Add-Within-100-Using-Strategies-42\"
    \nDixon read 14 books.<\/p>\n

    Independent Practice<\/strong><\/p>\n

    Solve the problems below. Show your work.
    \nQuestion 2.
    \nBrian has 17 fewer marbles than Kyle. Brian has 21 marbles. How many marbles does Kyle have?
    \n________ marbles
    \nAnswer:
    \nGiven that,
    \nTotal number of marbles at Brain = 21
    \nThe total number of marbles at Brain has\u00a0 fewer than Kyle\u00a0 = 17
    \nTotal number of marbles marbles at Kyle = 21 + 17 = 38
    \nQuestion 3.
    \nClint catches 7 frogs. 3 frogs hop away. Then Clint catches 6 more frogs. How many frogs does Clint have now?
    \n_________ frogs
    \nAnswer:
    \nGiven that,
    \nTotal number of frogs the Clint catches = 7
    \nTotal number of Frogs hop away = 3
    \nClint catches another more frogs = 6
    \nTotal number of frogs at Clint = 7 – 3 + 6 = 10
    \nQuestion 4.
    \nErwin sees 23 birds in a tree. Then 18 more birds come. How many birds does Erwin see now?
    \n_________ birds
    \nAnswer:
    \nGiven that,
    \nErwin sees the total number of birds in a tree = 23
    \nMore birds come on the tree = 18
    \nTotal number of birds that seen bye the Erwin\u00a0 = 23 + 18 = 41
    \nQuestion 5.
    \nThere are 31 bluefish in a pond. There are also 8 goldfish and 3 redfish in the pond. How many fish are in the pond?
    \n________ fish
    \nAnswer:
    \nGiven that
    \nTotal number of Blue fishes in a pound = 31
    \nTotal number of Goldfishes in a pound = 8
    \nTotal number of Red fishes in a pound = 3
    \nTotal number of fishes in a pound = 31 + 8 + 3 = 42
    \nQuestion 6.
    \nHigher Order Thinking<\/strong> Mr. Leu buys 6 bananas. Then he buys 8 more bananas. He gives some bananas to Mr. Shen. Now Mr. Leu has 5 bananas. How many bananas did Mr. Leu give to Mr. Shen?
    \n_________ bananas
    \nAnswer:
    \nGiven that,
    \nMr. Leu buys bananas = 6
    \nHe buys more bananas = 8
    \nTotal bananas at Mr. Leu = 6 + 8 = 14
    \nMr. Leu gave some bananas to the Mr. Shen
    \nMr. Leu left only 5 bananas
    \nMr. Leu gave to Mr. Shen = 14 – 5 = 9<\/p>\n

    Problem Solving<\/strong><\/p>\n

    Solve the problems below. Show your work.
    \nQuestion 7.
    \nThere are 21 more green crayons than blue crayons. There are 14 blue crayons. How many green crayons are there?
    \n__________ green crayons
    \nAnswer:
    \nGiven that,
    \nTotal number of Blue crayons = 14
    \nGreen crayons are 21 more than blue crayons.
    \nTotal number of Green crayons = 14 + 21 = 35<\/p>\n

    Question 8.
    \nMake Sense Dan swims 4 laps on Monday. He swims 5 laps on Tuesday. Then he swims 9 laps on Wednesday. How many laps does Dan swim in all?
    \n_________ laps
    \nAnswer:
    \nGiven that,
    \nDan swims on Monday = 4 laps
    \nDan swims on Tuesday = 5 laps
    \nDan swims on Wednesday = 9 laps
    \nTotal number of laps that Don swim = 4 + 5 + 9 = 18<\/p>\n

    Question 9.
    \nHigher Order Thinking<\/strong> Robert has 20 blueberries. He has 10 more blueberries than Janessa. He has 14 fewer blueberries than Amari. How many blueberries does Janessa have? How many blueberries does Amari have?
    \nJanessa has ________ blueberries.
    \nAmari has __________ blueberries.
    \nAnswer:
    \nGiven that,
    \nA robot has 20 blueberries
    \nHe has 10 more blueberries than Janessa
    \nJanessa has blueberries = 20 – 10 = 10
    \nThe robot has 14 blueberries fewer than Amari
    \nAmari has total number of blueberries = 20 + 14 = 34<\/p>\n

    Question 10.
    \nAssessment Practice<\/strong> Billy saw 19 animals at Grayson Zoo in the morning. He saw 17 more animals after lunch. How many animals did Billy see in all?
    \n__________ animals
    \nAnswer:
    \nGiven that,
    \nBilly saw animals at Grayson Zoo in the morning = 19
    \nBilly saw animals at Grayson Zoo in the afternoon = 17
    \nTotal number of animals that Billy saw = 19 + 17<\/p>\n

    Lesson 3.7 Problem Solving<\/h3>\n

    Construct Arguments
    \nSolve & Share<\/strong>
    \nCarrie has 16 more red apples than green apples. She has 24 green apples. How many red apples are there?
    \nUse any strategy to solve. Use pictures, numbers, or words to explain your thinking and work.<\/p>\n

    I can … use pictures, numbers, and words to explain why my thinking and work are correct.<\/p>\n

    Thinking Habits<\/strong>
    \nConstruct Arguments
    \nHow can I use math to explain why my work is correct?
    \nAm I using numbers and symbols correctly?
    \nIs my explanation clear?<\/p>\n

    Visual Learning Bridge
    \n\"Envision<\/p>\n

    Convince Me! Are both math arguments above clear and complete? Explain.<\/p>\n

    Guided Practice<\/strong><\/p>\n

    Solve. Use pictures, words, or numbers to make a math argument. Show your work.
    \nQuestion 1.
    \nThere are 16 chickens in the yard. There are 19 chickens in the barn. There are 30 nesting boxes. Will all of the chickens have a nest? Explain.
    \n\"Envision
    \nAnswer:
    \nGiven that,
    \nTotal number of Chickens in a yard = 16
    \nTotal number of Chickens in a barn = 19
    \nTotal number of Chickens in a nesting\u00a0 = 30
    \nTotal number of chickens = 16 + 19 = 35
    \n5 chickens have no nest<\/p>\n

    Independent Practice<\/strong><\/p>\n

    Solve each problem. Use pictures, words, or numbers to make a math argument. Show your work.
    \nQuestion 2.
    \nGreg had 45 sports cards. Jamal gives him 26 more cards. How many sports cards does Greg have now?
    \n\"Envision
    \n_________ sports cards
    \nAnswer:
    \nGiven that,
    \nTotal number of sports cards at Grah\u00a0 = 45
    \nJamal gives more cards to Grah = 26
    \nTotal number of sports cards at Grah = 45 + 26 = 71<\/p>\n

    Question 3.
    \nDenise drew 8 stars with crayons. Then she drew 6 more stars. Trina drew 5 stars. How many fewer stars did Trina draw than Denise?
    \n________ fewer stars
    \nAnswer:
    \nGiven that,
    \nDenise draw stars with crayons = 8
    \nShe draws more stars = 6
    \nTotal number of stars drawn by Denise = 8 + 6 = 14
    \nTrina draw a star = 5
    \n14 – 5 = 9
    \nTrina draw 9 fewer stars than Denise<\/p>\n

    Problem Solving<\/strong><\/p>\n

    Performance Task
    \nBean Bag Toss Evan and Pam each throw two bean bags. Points are added for a score. Pam’s total score is 100. Which two numbers did Pam’s bean bags land on?
    \n\"Envision
    \nQuestion 4.
    \nMake Sense What information is given? What do you need to find?
    \nAnswer:
    \nIn the above task, Pam and Evan play a bean bag toss game.
    \nThe score Pam’s is 100
    \nThe numbers that Pam’s bean bag lands on are 56 and 44.
    \nBy adding 56 and 44 we get 100.so, the beam bag lands on 56 and 44.
    \nQuestion 5.
    \nExplain Which numbers did Pam’s bags land on? Explain how you know.
    \nAnswer:
    \nGiven that,
    \nPam’s bags land on 56 and 44
    \n<\/span>The total score Pam’s is 100
    \nBy adding 56 and 44 we get 100
    \nSo, Pam’s bags are landed on 56 and 44.<\/p>\n

    Question 6.
    \nExplain How could you use a hundred charts to solve the problem? Explain.
    \n\"Envision
    \nAnswer:
    \nusing a hundred charts for example you went to find the sum of 10\u00a0 + 15.
    \nfirst, mark the 10 in the hundred charts and down to 1 row and back to 5 places then we get 15 has the answer.
    \nThis is the way to solve the problem using a hundred charts.<\/p>\n

    Topic 3 Fluency Practice Activity<\/h3>\n

    Find & Match<\/strong>
    \nFind a partner. Point to a clue. Read the clue.
    \nLook below the clues to find a match. Write the clue letter in the box next to the match.
    \nFind a match for every clue.
    \nI can … subtract within 20.<\/p>\n

    Clues
    \nA. Every difference equals 3.
    \nB. Every difference is less than 2.
    \nC. Every difference equals 11 \u2013 5.
    \nD. Exactly two differences are equal.
    \nE. Every difference is greater than 8.
    \nF. Exactly three differences are odd.
    \nG. Every difference equals 16 – 8.
    \nH. Exactly three differences are even.<\/p>\n

    \"Envision<\/p>\n

    Topic 3 Vocabulary Review<\/h3>\n

    Understand Vocabulary
    \nWord List<\/p>\n

      \n
    • bar diagram<\/li>\n
    • break apart<\/li>\n
    • compensation<\/li>\n
    • mental math<\/li>\n
    • ones<\/li>\n
    • open number line<\/li>\n
    • tens<\/li>\n<\/ul>\n

      Question 1.
      \nCircle the numbers that have a 3 in the one’s place.
      \n33
      \n45
      \n13
      \n38
      \nAnswer:
      \nIn the above-given numbers, 33 and 13 has 3 in the one’s place then circle the 33 and 13.
      \nQuestion 2.
      \nCross out the numbers that do NOT have an 8 in the tens place.
      \n80
      \n18
      \n78
      \n89
      \nAnswer:
      \nIn the above-given numbers, 18 and 78 do not have 8 in the ten’s place. Then cross out the 18 and 78.
      \n\"Envision-Math-Common-Core-2nd-Grade-Answers-Topic-3-Add-Within-100-Using-Strategies-20
      \nQuestion 3.
      \nWrite an equation to show how to break apart 54 by place value.
      \nAnswer: 50 + 4
      \nQuestion 4.
      \nUse the open number line to find 38 + 23. Add the tens and then add the ones.
      \n\"Envision
      \nAnswer:
      \n38 + 23
      \n38 + (20 + 3)
      \n58 + 3 = 61
      \nFirst draw the Line.
      \nRepresent the number on the line.
      \nThe first number is 38 and counts by 20 then it gets 54 and jumps to 3 then it gets 61.
      \nCount the numbers and draw an arrow.
      \n\"Envision-Math-Common-Core-2nd-Grade-Answer-Key-Topic-3-Add-Within-100-Using-Strategies-18<\/p>\n

      Use Vocabulary in Writing<\/strong>
      \nQuestion 5.
      \nDescribe a way to find 47 + 18. Use terms from the Word List.
      \nAnswer:
      \n47 + (10 + 8)
      \n(47 + 10) + 8
      \n57 + 8 = 65<\/p>\n

      Topic 3 Reteaching<\/h3>\n

      Set A<\/strong><\/p>\n

      You can use a hundred charts to help you add. Find 62 + 12.
      \nStart at 62. Move down 1 row to add the 1 ten in 12.
      \nThen move over 2 columns to add the 2 ones in 12.
      \n\"Envision<\/p>\n

      Use a hundred charts to find each sum.
      \nQuestion 1.
      \n85 + 15 = _______
      \nAnswer:
      \nUsing the hundred chart the sum of 85 + 15 is
      \nIn the hundred charts, we start at the 85 then down to 1 row then we get 95, and move front to 5 space then we get 100.
      \n85 + 15 = 100
      \nQuestion 2.
      \n60 + 23 = _________
      \nAnswer:
      \nUsing the hundred chart the sum of 60 + 23 is
      \nIn the hundred charts, we start at 60 and then move down to 2 rows then we get 80 and move front to 3 space then we get 83
      \n60 + 23 = 83<\/p>\n

      Set B<\/strong><\/p>\n

      You can use an open number line to find 49 + 32.
      \n\"Envision
      \nPlace 49 on the number line. There are 3 tens in 32. So, count on by 10 three times. There are 2 ones in 32. So, count on 2 from 79.
      \nSo, 49 + 32 = 81<\/p>\n

      Use an open number line to find each sum.
      \nQuestion 3.
      \n35 + 13 = ________
      \n\"Envision
      \nAnswer:
      \n35 + 13 = 48
      \nFirst, draw the Line.
      \nRepresent the number on the line.
      \nThe first number is 35 and counts by 10 then it gets 45\u00a0 and jumps to 3 then it gets 48.
      \nCount the numbers and draw an arrow.
      \n\"Envision-Math-Common-Core-Grade-2-Answers-Topic-3-Add-Within-100-Using-Strategies-52<\/p>\n

      Question 4.
      \n47 + 26 = _________
      \n\"Envision
      \nAnswer:
      \n47 + 26 = 73
      \nFirst, draw the Line.
      \nRepresent the number on the line.
      \nThe first number is 47 and counts by 20 then it gets 67 and jumps to 6 then it gets 73.
      \nCount the numbers and draw an arrow.
      \n\"Envision-Math-Common-Core-Grade-2-Answers-Topic-3-Add-Within-100-Using-Strategies-52<\/p>\n

      Set C<\/strong><\/p>\n

      Find 55 + 17.
      \nBreak apart 17 into 10+ 7.
      \n\"Envision<\/p>\n

      Break apart the second addend to find the sum. Show your work.
      \nQuestion 5.
      \n53 + 28 = _________
      \nAnswer:
      \n53 + 28
      \n53 + 20 + 8
      \n73 + 8 = 81Question 6.
      \n78 + 19 = _________
      \nAnswer:
      \n78 + 19
      \n78 + 10 + 9
      \n88 + 9 = 97<\/p>\n

      Set D<\/strong><\/p>\n

      Find 48 + 27.
      \n48 is close to 50. So, take 2 from 27 and give it to 48 to make 50.
      \n48 + 27 = ?
      \n\"Envision<\/p>\n

      Use compensation to make numbers that are easier to add. Then solve. Show your work.
      \nQuestion 7.
      \n17 + 46 = ________
      \nAnswer:
      \n17 + 46
      \n17 + 40 + 6
      \n57 + 6 = 63<\/p>\n

      Question 8.
      \n29 + 57 = ________
      \nAnswer:
      \n29 + 57
      \n29 + 50 + 7
      \n79 + 7 = 86<\/p>\n

      Set E<\/strong><\/p>\n

      You can use different strategies and tools to find a sum.
      \nYou can:<\/p>\n

        \n
      • Use a hundred chart<\/li>\n
      • Use an open number line<\/li>\n
      • Break apart one addend<\/li>\n
      • Use compensation<\/li>\n<\/ul>\n

        Solve. Show your work.
        \nQuestion 9.
        \nTed’s puzzle has 37 more pieces than his brother’s puzzle. His brother’s puzzle has 48 pieces. How many pieces does Ted’s puzzle have?
        \n________ pieces
        \nAnswer:<\/p>\n

        Given that,
        \nTed’s puzzle has more pieces than her brother = 37
        \nHis brother puzzle has pieces = 48
        \nTotal number of pieces does Ted’s have = 48 + 37 = 85<\/p>\n

        Set F<\/strong><\/p>\n

        Marla walks 12 blocks on Monday. On Tuesday, she walks 4 fewer blocks. How many blocks does Marla walk in all?
        \nBlocks Marla walks on Tuesday:
        \n\"Envision<\/p>\n

        Solve the two-step problem.
        \nQuestion 10.
        \nWyatt has 16 crayons. He buys 24 new crayons. Then he finds 7 more crayons. How many crayons does Wyatt have now?
        \n\"Envision
        \n________ crayons
        \nAnswer:
        \n\"Envision-Math-Common-Core-Grade-2-Answers-Topic-3-Add-Within-100-Using-Strategies-56\"
        \nTotal number of crayon = 47<\/p>\n

        Set G<\/strong><\/p>\n

        Thinking Habits<\/strong>
        \nConstruct Arguments
        \nHow can I use math to explain my work?
        \nAm I using numbers and symbols correctly?
        \nIs my explanation clear?
        \n\"Envision<\/p>\n

        Solve the problem. Use words and numbers to make a math argument.
        \nQuestion 11.
        \nA second-grade class sets a goal to collect 70 cans. One week they collect 38 cans. The next week they collect 35 cans. Do they meet their goal?
        \nAnswer:
        \nGiven that,
        \nA second-grade class set a goal to collect cans = 70
        \nOne week the second-grade class set collect cans = 38
        \nNext week the second-grade class set collect cans = 35
        \nTotal number of cans they collected = 38 + 35 =73
        \nYes they meet their goal by collecting 73 cans out of 70<\/p>\n

        Topic 3 Assessment Practice<\/h3>\n

        Question 1.
        \nWhich have a sum of 43? Choose all that apply.
        \n\u2610 33 + 10
        \n\u2610 28 + 13
        \n\u2610 10 + 33
        \n\u2610 19 + 24
        \n\u2610 10 + 21
        \nAnswer:
        \n33 + 10 has a sum of 43
        \n10 + 33 has a sum of 43
        \n19 + 24 has a sum of 43
        \nQuestion 2.
        \nTerry has 63 crayons. She gets 25 more crayons. How many crayons does Terry have in all? Show your work.
        \n________ crayons
        \nAnswer:
        \nGiven that,
        \nTotal number of crayons near Terry = 63
        \nTenny get more crayons = 25
        \nTotal number of crayons at Terry = 63 + 25 = 88
        \nQuestion 3.
        \nWhich equation does this number line show?
        \n\"Envision
        \nA. 57 + 28 = 85
        \nB. 57 + 38 = 95
        \nC. 57 + 33 = 90
        \nD. 57 + 39 = 96
        \nAnswer:
        \n57 + 38 = 95
        \nQuestion 4.
        \nUse the numbers on the cards. Write the missing numbers under the number line to show how to find the sum of 40 + 35.
        \n\"Envision
        \nAnswer:
        \nQuestion 5.
        \nColin has 54 pennies and 28 nickels. How many coins does Colin have?
        \nBreak apart the second addend to solve. Show your work.
        \n________ coins
        \nAnswer:
        \nGiven that,
        \nTotal number of pennies near Colin = 54
        \nTotal number of nickels near Colin = 28
        \nTotal number of coins near colin = 54 + 28
        \n54 + (20 + 8)
        \n(54 + 20) + 8
        \n74 + 8 = 82<\/p>\n

        Question 6.
        \nShow how to add 68 + 16 using the open number line.
        \n\"Envision
        \n68 + 16 = ___________
        \nAnswer:
        \n68 + 16 = 84
        \nFirst draw the Line.
        \nRepresent the number on the line.
        \nThe first number is 68 and counts by 10 then it gets 78 and jumps to 6 then it gets 84.
        \nCount the numbers and draw an arrow.
        \n\"Envision-Math-Common-Core-Grade-2-Answers-Topic-3-Add-Within-100-Using-Strategies-52
        \nQuestion 7.
        \nPart A
        \nShow how you can use an open number line to find 44 + 27.
        \n\"Envision
        \n44 + 27 = _________
        \nAnswer:
        \n44 + 27 = 71
        \nFirst draw the Line.
        \nRepresent the number on the line.
        \nThe first number is 44 and counts by 20 then it gets 64 and jumps to 7 then it gets 71.
        \nCount the numbers and draw an arrow.
        \n\"Envision-Math-Common-Core-Grade-2-Answers-Topic-3-Add-Within-100-Using-Strategies-52<\/p>\n

        Part B
        \nIn words, tell how you used the open number line to find the sum.
        \nAnswer:
        \nSuppose\u00a0 we have a sum that is 14 + 13
        \nThen draw a line and represent the numbers on a line and place a 14 on the line shift\u00a0 10 from the 14 we get 24 then jump to 3 then we get 27.
        \nThe sum of 14 + 13 = 27.
        \n\"Envision-Math-Common-Core-2nd-Grade-Answer-Key-Topic-3-Add-Within-100-Using-Strategies-18<\/p>\n

        Question 8.
        \nWhich have a sum of 70? Choose all that apply.
        \n\u2610 35 + 35
        \n\u2610 40 + 30
        \n\u2610 45 + 45
        \n\u2610 50 + 200
        \n\u2610 30 + 30
        \nAnswer:
        \n35 + 35
        \n40 + 30<\/p>\n

        Question 9.
        \nLisa has 18 markers. Adam has 22 markers. Will all of the markers fit in a box that can hold 38 markers?
        \nMake a math argument. Explain.
        \nAnswer:
        \nGiven that,
        \nTotal number of markers near Lisa = 18
        \nTotal number of markers near Adam = 22
        \nTotal number of Markers fit in a box = 38
        \nTotal number of markers = 18 + 22 = 40
        \nTotal markers are not fit into a box.<\/p>\n

        Question 10.
        \nTed has 52 cards in a box. Tyrone has 48 more cards than Ted. How many cards does Tyrone have? Show your work to explain your thinking.
        \n________ cards
        \nAnswer:
        \nGiven that
        \nTed has\u00a0 cards in a box = 52
        \nTyrone has more card than Ted = 48
        \nTotal number of cards at Tyrone = 52 + 48 = 100
        \nQuestion 11.
        \nWhich are equal to 47 + 25? Choose all that apply.
        \n\u2610 40 + 20 + 7 +5
        \n\u2610 40 + 20 + 12
        \n\u2610 50 + 12
        \n\u2610 50 + 22
        \nAnswer:
        \nTo find the sum of 47 + 25 we apply the 40 + 20 + 7 + 5<\/p>\n

        Question 12.
        \nEmma has 46 rocks. She gets 25 more rocks from Gus. How many rocks does Emma have now?
        \n\"Envision
        \n________ rocks
        \nAnswer:
        \nGiven that,
        \nEmma has rocks = 46
        \nShe get more rocks = 25
        \nTotal number of rocks at Emma = 46 + 25 = 71
        \nQuestion 13.
        \nIs each sum 64? Choose Yes or No.
        \n\"Envision
        \nAnswer:
        \n\"Envision-Math-Common-Core-Grade-2-Answers-Topic-3-Add-Within-100-Using-Strategies-62\"<\/p>\n

        Question 14.
        \nBreak apart the second addend to find 56 + 38. Show your work.
        \n\"Envision
        \n56 + 38 = ________
        \nAnswer:
        \n56 + 38
        \n56 + 30 + 8
        \n86 + 8 = 94<\/p>\n

        Question 15.
        \nWrite an equation to solve each part of the two-step problem.
        \nKen has 45 stamps. He uses 20 stamps. Then he buys 7 more stamps. How many stamps does he have now?
        \n\"Envision
        \nKen has ________ stamps.
        \nAnswer:
        \nGiven that,
        \nKen has total number of stamps = 45
        \nHe used total number of stamps = 20
        \nHe buy another stamps = 7
        \nTotal number of stamps Ken have = 45 – 20 + 7
        \n25 + 7 = 32<\/p>\n

        Question 16.
        \nShow two different ways to find 28 + 49 using compensation.
        \nWay 1
        \nWay 2
        \nAnswer:
        \nWay 1: 28 + 49 = 77
        \nWay 2:\u00a0 28 + 49
        \n28 + 40 + 9
        \n68 + 9 = 77<\/p>\n

        Topic 3 Performance Task<\/h3>\n

        Popcorn Sales<\/strong>
        \nA second-grade class is selling popcorn to help pay for a field trip.
        \nThis table shows how many boxes some students have sold.
        \n\"Envision<\/p>\n

        Question 1.
        \nHow many boxes of popcorn did Ted and Mary sell in all? Use the open number line to solve. Show your work.
        \n\"Envision
        \n_________ boxes
        \nAnswer:
        \nGiven that,
        \nNumber of popcorn did Ted sell = 21
        \nNumber of popcorn did Mary sell = 34
        \nTotal number of popcorn box sell = 21 + 34 = 55
        \nFirst draw the Line.
        \nRepresent the number on the line.
        \nThe first number is 21and counts by 30 then it gets 51and jumps to 4 then it gets 80.
        \nCount the numbers and draw an arrow.<\/p>\n

        Question 2.
        \nJames says that Mary and Nancy sold more boxes in all than Darnell and Ted sold in all. Do you agree with him?
        \nCircle:
        \nYes
        \nNo
        \nExplain your answer.
        \nAnswer:
        \nGiven that,
        \nTotal number of boxes sold by Mary = 34
        \nTotal number of boxes sold by Nancy = 19
        \nTotal number of boxes sold by Mary and Nancy = 34 + 19 = 43
        \nTotal number of boxes sold by Darnell = 28
        \nTotal number of boxes sold by Ted = 21
        \nA total number of boxes sold by Darnell and Ted = 21 + 28 = 49
        \nJames said wrong that Mary and Nancy sold fewer boxes than Darnell and Ted.
        \nQuestion 3.
        \nWhich two students sold a total of 55 boxes? Use any strategy to solve. Show your work.
        \nCircle the names of the two students.
        \n\"Envision<\/p>\n

        Question 4.
        \nNancy sold 18 fewer boxes than Lucas. How many boxes did Lucas sell?<\/p>\n

        Part A
        \nSolve the problem. Show your work and explain your thinking.
        \n________ boxes
        \nAnswer:
        \nGiven that,
        \nNancy sold fewer boxes than Lucas = 18
        \nTotal number of boxes that Nancy sold = 19
        \nTotal number of boxes that Lucas sold more than Nancy = 19 – 18 = 1<\/p>\n

        Part B
        \nLook at the list of strategies on the left. To show that your answer in Part A is correct, use a different strategy to solve the problem.
        \nAnswer:<\/p>\n","protected":false},"excerpt":{"rendered":"

        Go through the\u00a0enVision Math Common Core Grade 2 Answer Key\u00a0Topic 3 Add Within 100 Using Strategies\u00a0regularly and improve your accuracy in solving questions. enVision Math Common Core 2nd Grade Answers Key Topic 3 Add Within 100 Using Strategies Essential Question: What are strategies for adding numbers to 100? enVision STEM Project: Earth Changes and Addition …<\/p>\n","protected":false},"author":1,"featured_media":25623,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/envisionmathanswerkey.com\/wp-content\/uploads\/2021\/06\/enVision-Math-Common-Core-Grade-2-Answer-Key-Topic-3-Add-Within-100-Using-Strategies.png","_links":{"self":[{"href":"https:\/\/envisionmathanswerkey.com\/wp-json\/wp\/v2\/posts\/13519"}],"collection":[{"href":"https:\/\/envisionmathanswerkey.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/envisionmathanswerkey.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/envisionmathanswerkey.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/envisionmathanswerkey.com\/wp-json\/wp\/v2\/comments?post=13519"}],"version-history":[{"count":4,"href":"https:\/\/envisionmathanswerkey.com\/wp-json\/wp\/v2\/posts\/13519\/revisions"}],"predecessor-version":[{"id":28208,"href":"https:\/\/envisionmathanswerkey.com\/wp-json\/wp\/v2\/posts\/13519\/revisions\/28208"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/envisionmathanswerkey.com\/wp-json\/wp\/v2\/media\/25623"}],"wp:attachment":[{"href":"https:\/\/envisionmathanswerkey.com\/wp-json\/wp\/v2\/media?parent=13519"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/envisionmathanswerkey.com\/wp-json\/wp\/v2\/categories?post=13519"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/envisionmathanswerkey.com\/wp-json\/wp\/v2\/tags?post=13519"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}