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 Strategies Find 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. Journal: Make a Book Show what you learn in a book. In your book, also: Write new science words you learn. Draw pictures that help show what the words mean. Write new math words you learn. Draw pictures that help show what the words mean. Review What You Know Vocabulary Question 1. Draw a circle around each even number. Use cubes to help. 15 7 14 2 19 18 Answer: In the given numbers 14, 2 and 18 are the even numbers.know draw a circle around the 14, 2 and 18. Question 2. Draw a square around each odd number. Use cubes to help. 12 3 6 17 11 4 Answer: In the given numbers 3,17 and 11 are the odd numbers. Know draw the square around the 3, 17 and 11. Question 3. Complete the bar diagram…

Envision Math Common Core 2nd Grade Answers Key Topic 4 Fluently Add Within 100 Essential Question: What are strategies for adding numbers to 100? enVision STEM Project: Making and Using Models Find Out Find and share books about Hawaii and volcanoes. Make a model of a volcano that becomes an island. Tell about how the island can change over a long time. Journal: Make a Book Show what you learn in a book. In your book, also: Draw pictures to show how volcanoes can become islands. Show how you can use models to help you add numbers to 100. Review What You Know Vocabulary Question 1. Circle the tens digit in each number. 73 53 82 Answer: The tens digit in each number is 7,5 and 8. Explanation: Given that the digits are 73, 53, 82. So the tens digit in each number is 7,5 and 8. Question 2. Circle the ones digit in each number. 34 43 97 Answer: The ones digit in each number is 4,3 and 7. Explanation: Given that the digits are 73, 53, 82. So the one digit in each number is 4,3 and 7. Question 3. Break apart 23 into tens and ones. 23…

## Envision Math Common Core Grade 2 Answer Key Topic 5 Subtract Within 100 Using Strategies

Envision Math Common Core 2nd Grade Answers Key Topic 5 Subtract Within 100 Using Strategies Essential Question: What are strategies for subtracting numbers to 100? enVision STEM Project: Heating, Cooling, and Subtraction Find Out Have an adult help you heat and cool water and other · materials. Find out if water and ice can change back and forth. Find out if heating and cooling an egg can change it back and forth. Journal: Make a Book Show what you learn in a book. In your book, also: Tell about how heating and cooling are related Tell about how addition and subtraction are related Review What You Know Vocabulary Question 1. Circle each difference in the math problems shown below. 15 – 5 = 10 Answer: Explanation: In the above image we can observe two mathematical operations one is Subtraction and other is addition. Here we have to circle the difference in the above problems. By subtracting five from fifteen then the difference is 10. So draw a circle to the difference 10. By subtracting seven from the fourteen then the difference is 7. So draw a circle for 7. By adding 23 with 32 then the sum is 55. Here…

## Envision Math Common Core Grade 2 Answer Key Topic 6 Fluently Subtract. Within 100

Envision Math Common Core 2nd Grade Answers Key Topic 6 Fluently Subtract. Within 100 Essential Question: What are strategies for subtracting numbers to 100? enVision STEM Project: Finding Water and Finding Differences Find Out Use globes, maps, books, and other sources to find out where water, snow, and ice can be found on Earth. Make a list of different names of bodies of water and names of bodies of snow and ice. Journal: Make a Book Show what you learn in a book. In your book, also: Tell about how globes are models that show where water is found on Earth. Tell about how to use a subtraction model to find differences. Review What You Know Vocabulary Question 1. Break apart 56 into tens 1 and ones. Draw place value blocks to show the parts. 56 = _______ + ________ Answer: Question 2. Complete the drawing to show how to regroup 1 ten as ones. Answer: Question 3. Complete the bar diagram to model 64 – 31 = ? Answer: Open Number Lines Question 4. Find 40 – 25 by counting back on an open number line. Show your work. 40 – 25 = _______ Answer: Question 5. Find 45…

## Envision Math Common Core Grade 2 Answer Key Topic 7 More Solving Problems Involving Addition and Subtraction

Envision Math Common Core 2nd Grade Answers Key Topic 7 More Solving Problems Involving Addition and Subtraction Essential Question: How can you solve word problems that use adding or subtracting? envision STEM Project: Solving Problems Find Out Find and share books that tell about ways to protect land from damage that wind or water can cause. Compare the different ways to protect the land. Journal: Make a Book Show what you learn in a book. In your book, also: Show ways to solve problems caused by wind or water. Show ways to solve problems using addition or subtraction. Review What You Know Vocabulary Question 1. Write the subtraction problem below as an equation. Answer: The equation for the above subtraction problem is 75 – 30 = 45 Explanation: Subtraction is an arithmetic operation that represents the operation of removing objects from a collection. Subtract 30 from 75 results 45. The problem can be written as an equation format is 75 – 30 = 45. Question 2. Complete the bar diagram to model 77 + 22 = ? Answer: 77 + 22 = 99 Explanation: The addition is taking two or more numbers and adding them together results sum. In the…

## Envision Math Common Core Grade 2 Answer Key Topic 8 Work with Time and Money

Envision Math Common Core 2nd Grade Answers Key Topic 8 Work with Time and Money Essential Question: How can you solve problems about counting money or telling time to the nearest 5 minutes? enVision STEM Project: Money Matters Find Out Collect examples of different types of coins and dollar bills. Describe how different coins and bills look and feel. Sort the money by size, color, and whether or not you can bend it. Journal: Make a Book Show what you find out in a book. In your book, also: Tell how different types of coins are alike. Tell how they are different. Show as many different ways as you can to make 25¢. Review What You Know Vocabulary Question 1. Draw the hands to show 8 o’clock. Answer: The hands in the above clock shows 8 o’clock. Explanation: Clocks have 2 hands one is a little hand and other is a big hand. The little hand marks the hour. The bigger hand marks the minutes. Whichever number it’s pointing to is the hour of the day. Here the little hand is pointing to “8” it’s in the 8 o’clock hour. Question 2. Circle the number of minutes in one hour.…

## Envision Math Common Core Grade 5 Answer Key Topic 5 Use Models and Strategies to Divide Whole Numbers

Envision Math Common Core 5th Grade Answers Key Topic 5 Use Models and Strategies to Divide Whole Numbers Envision STEM Project: Average Temperature Does Research Use a weather site from the Internet or another source of daily weather reports to find the average daily temperature for your city or town for every day of one month? The average daily temperature is the average temperature for a whole 24-hour period. Journal: Write a Report that Includes what you found about daily temperatures. Also in your report: • Find the average daily high temperature for the month. Which day had the greatest high temperature? • Find the average daily low temperature for the month. Which day had the least low temperature? • Makeup and solve division problems based on your data. Review What You Know VOC • dividend • quotient • divisor • remainder Choose the best term from the box. Write it in the blank. Question 1. In the equation 80 ÷ 10 = 8, the number 80 is the ___. Answer: 80 is called dividend Question 2. The number used to divide another number is the ___. Answer: The number used to divide another number is the Divisor Question 3.…

## Envision Math Common Core Grade 5 Answer Key Topic 4 Use Models and Strategies to Multiply Decimals

Envision Math Common Core 5th Grade Answers Key Topic 4 Use Models and Strategies to Multiply Decimals Essential Question: What are some common procedures for estimating and finding products involving decimals? enVision STEM Project: Solar Energy Do Research Use the Internet or other sources to learn about solar energy. Find at least five ways that we use the Sun’s energy today. Answer: To dry your clothes. To grow your food. To heat your water. To power your car. To generate your electricity. Explanation: In the above-given question, given that, The sun has gone to a lot of trouble to send us its energy. we can use solar energy in many ways. they are: to dry your clothes. to grow your food. to heat your water. to power your car. to generate your electricity. Journal: Write a Report Include what you found. Also in your report: • Describe at least one way that you could use solar energy. Could it save you money? • Estimate how much your family pays for energy costs such as lights, gasoline, heating, and cooling. • Make up and solve problems by multiplying whole numbers and decimals. Review What You Know Vocabulary Choose the best term…

## Envision Math Common Core Grade 5 Answer Key Topic 3 Fluently Multiply Multi-Digit Whole Numbers

Envision Math Common Core 5th Grade Answers Key Topic 3 Fluently Multiply Multi-Digit Whole Numbers Essential Question: What are the standard procedures for estimating and finding products of multi-digit numbers? enVision STEM Project: Water Usage Do Research Use the Internet or other sources to find how much water is used for household activities like taking a shower or bath, using a dishwasher, hand washing dishes, and using a washing machine. Journal: Write a Report Include what you found. Also in your report: Choose 3 of the activities. Estimate how many times each activity is done each week in your household. Estimate the weekly water usage for each activity. Organize your results in a table. Make up and solve multiplication problems based on your data. Review What You Know Vocabulary Choose the best term from the box. Write it on the blank. • multiple • equation • exponent • power • factor • product Question 1. The answer to a multiplication problem is the ____. Answer: The answer to a multiplication problem is the product. Explanation: In the above-given question, given that, the answer to a multiplication problem is called the product. for example: 15 x 2 = 30. 15 is…

## Envision Math Common Core Grade 4 Answer Key Topic 3 Use Strategies and Properties to Multiply by 1-Digit Numbers

Envision Math Common Core 4th Grade Answers Key Topic 3 Use Strategies and Properties to Multiply by 1-Digit Numbers Essential Questions: How can you multiply by multiples of 10, 100, and 1,000? How can you multiply whole numbers? enVision STEM Project: Maps and Math Do Research Use the Internet or other sources to find information about three of Earth’s features on a topographic map, such as mountains or oceans. Write two facts about each of the features you researched. Journal: Write a Report Include what you found. Also in your report: Write the height or depth of each feature you researched. Estimate to find 10 times the heights or depths of the features you researched. Review What You Know Vocabulary Choose the best term from the box. Write it on the blank. breaking apart compensation inverse operations partial products Question 1. Multiplication and division are _________. Answer: Multiplication and division are ____inverse operations____.     Question 2. A mental math method used to rewrite a number as the sum of numbers to form an easier problem is called __________. Answer: A mental math method used to rewrite a number as the sum of numbers to form an easier problem is…