Envision Math 2nd Grade Textbook Answer Key Topic 2.5 Adding Three Numbers
Adding Three Numbers
Question 1.
My numbers: ____ , ____ , ____
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Question 2.
My numbers: ____ , ____ , ____
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Question 3.
My numbers: ____ , ____ , ____
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Question 4.
My numbers: ____ , ____ , ____
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Home Connection Your child added three numbers.
Home Activity Have your child use pennies or other small objects to show different ways to add 9 + 1 + 4.
Continue by adding three other numbers less than 10.
AF 1.1 Use the commutative and associative rules to simplify mental calculations and to check results.
Also MR 1.0, MR 1.1, MR 2.0.
Guided Practice
Find each sum in two different ways.
Circle the numbers you added first.
Then write their sum in the box.
Question 1.
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Question 2.
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Question 3.
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Question 4.
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Do you understand? What are two different ways you could add 3 + 4 + 7? Explain.
Independent Practice
Write the sum.
Circle the numbers you added first
Question 5.
3 + 8 + 2 =
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Question 6.
5 + 7 + 5 =
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Question 7.
9 + 4 + 1 =
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Question 8.
6 + 5 + 7 = ___
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Question 9.
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Question 10.
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Question 11.
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Question 12.
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Algebra
Find the missing number
Question 13.
6 + + 3 = 10
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Question 14.
5 + 5 + = 15
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Problem Solving
Solve the problems below.
Question 15.
There are three kinds of balls. List 3 different ways you can add to find the total number of balls.
_________________
_________________
_________________
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Question 16.
Josie has 2 baseballs and her brother has 4.
They then got 8 more as a gift.
How many baseballs do they now have in all?
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Question 17.
Journal Use pictures, numbers, or words to show two different ways to add 4 + 2 + 6. Explain your thinking
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