We included HMH Into Math Grade 2 Answer Key PDF Module 1 Lesson 3 Relate Addition and Subtraction to make students experts in learning maths.

I Can write and solve related addition and subtraction facts.

How can you show the number of pieces of pizza that Kayla and her friends have?  Explanation:
Addition fact that match the problem is 5 + 8 = 13
Subtraction fact that match the problem is 13 – 5 = 8

Read the following problem: Kayla and her friends have 5 pieces of cheese pizza and 7 pieces of mushroom pizza. How can you show the number of pieces of pizza that they have? Have children show how their concrete models or drawings will change if Kayla and her friends eat 5 pieces of pizza. Then have children write an addition fact and a subtraction fact to match their concrete models or drawings.

Build Understanding

There are 6 ducks in a pond. Then 9 ducks join them. How many ducks are in the pond now? A. How can you draw to show the two groups of ducks? B. How can you write an addition fact to solve the problem?
___ + ___ = ___ ____ ducks
6 + 9 = 15

C. How can you complete the bar model to show the problem?  D. How can you use the addends in the addition fact to find the difference for a related subtraction fact? Use the bar model to help. 15 – 6 = ___
15 – 6 = 9

Turn and Talk How does knowing 6 + 4 = 10 help you find 10 – 6 = ? Explain.

Step It Out

1. Use related facts to complete a bar model.
9 + 7 = ___
7 + 9 = ___
9 + 7 = 16
7 + 9 = 16

B. Write 9, 7, and 16 in the bar model.  C. Complete the related subtraction facts.
16 – 9 = ____
16 – 7 = ___
16 – 9 = 7
16 – 7 = 9

Explanation:
I wrote the related subtraction facts.

Check Understanding

Question 1.
Kane counts 7 grasshoppers ¡n the backyard and some grasshoppers in the front yard. There are 11 grasshoppers in all. How many grasshoppers are in the front yard? Write an addition fact. Complete the bar model. Write a related subtraction fact. Solve.  Explanation:
There are 4 grasshoppers in the front yard.

Question 2.
Attend to Precision There are 15 items in a storage box. There are 7 books. The rest of the items are toys. How many toys are in the storage box? Write an addition fact. Complete the bar model. Write a related subtraction fact. Solve.   Explanation:
There are 8 toys in the storage box.

Question 3.
Use Repeated Reasoning Complete the related facts.
9 + 4 = ____ 13 – 9 = ___
4 + 9 = ____ 13 – 4 = ____
9 + 4 = 13, 13 – 9 = 4
4 + 9 = 13, 13 – 4 = 9.

Explanation:
I wrote all the related facts of above numbers.

Question 4.
Open Ended Write on addition fact and a related subtraction fact. Explain how the two facts are related.
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