## Envision Math 2nd Grade Textbook Answer Key Topic 2.6 Making 10 to Add 9

**Making 10 to Add 9**

Question 1.

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Question 2.

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Question 3.

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Question 4.

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**Home Connection** Your child explored strategies for making 10 to help add with 9.

**Home Activity** Have your child use pennies to make a group of 9 and a group of 5. Ask your child to show you how to make a group of 10 pennies to help find the sum.

AF 1.1, Grade 1 Write and solve number sentences from problem situations that express relationships

involving addition and subtraction. Also AF 1.0.

**Guided Practice**

Make 10 to add 9.

Use counters and your workmat.

Question 1.

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Question 2.

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Do you understand? Compare adding 9 to any number and adding 10 to that same number. What is different?

**Independent Practice**

Make 10 to add 9.

Use counters and your workmat.

Question 3.

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Question 4.

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Question 5.

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Question 6.

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Question 7.

8 +9 = ___

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Question 8.

9 + 7 = ___

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Question 9.

9 +2 = ___

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Question 10.

9 +9 =___

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Question 11.

1 +9 = ___

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Question 12.

5 + 9 = ___

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**Number Sense**

Find the missing number.

Question 13.

9 + 3 = + 2

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Question 14.

+ 9 = 10 + 6

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**Problem Solving**

Solve the problems below.

Question 15.

Tan’s team has 9 points. They score 7 more points. How many points do they have in all?

___ points

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Question 16.

Ana’s team has 9 bats. Nico’s team has 8 bats. How many bats are there in all?

___ bats

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Question 17.

Mary wrote an addition sentence. What number makes her addition sentence true? Mark your answer.

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Question 18.

Journal Draw a picture to show how you can make 10 to help you add 5 + 9.

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