# Into Math Grade 2 Module 1 Lesson 7 Answer Key Add 3 Numbers Using Mental Strategies and Properties

We included HMH Into Math Grade 2 Answer Key PDF Module 1 Lesson 7 Add 3 Numbers Using Mental Strategies and Properties to make students experts in learning maths.

## HMH Into Math Grade 2 Module 1 Lesson 7 Answer Key Add 3 Numbers Using Mental Strategies and Properties

I Can find the sum of three numbers.

How can you show the number of stuffed animals Logan has?   Explanation: 6 + 2 = 8, 8 + 4 = 12.
Logan has 12 stuffed animals.

Read the following problem: Logan collects stuffed animals. He has 6 cats, 2 teddy bears, and 4 dogs. How many stuffed animals does Logan have? Have children use tools to add the three numbers.

Build Understanding

On the playground, there are 4 children playing ball, 3 children on the swings, and 2 children playing in a sandbox. How many children are on the playground? A. How can you use tools to show each addend?  B. How can you group two addends to odd first? Draw to show what you did.  C. Complete the addition fact to solve the problem.
4 + 3 + 2 = ___
___ children

Explanation:
Add 4 + 3 = 7, 7 + 2 = 9
9 children are at the playground.

Turn and Talk How can you group the addends in a different order to solve the problem? Explain.

Step It Out

1. Alice has4 small toy boats, 5 toy cars, and 3 toy trucks. How many toys does she have? A. Write an addition fact to show the problem.
___ + ___ + ___ = THINK: Look for facts you know.
___ + ___ + ___ = ___ + ___ = ___
___ + ___ = ___ toys Explanation:
4 + 5 + 3 = 12
Alice have 12 toys.

Check Understanding Math Board

Question 1.
There are 4 pink pens, 5 red pens, and 5 blue pens in a box. How many pens are in the box? Write an addition fact to show the problem. Circle two addends to add first. Write the sum.
___ + ___ + ___ = ___
____ pens Explanation:
4 + 5 + 5 = 14
There are 14 pens in the box.

Choose two addends to odd first. Circle the addends. Write the sum.

Question 2.
3 + 2 + 6 = ___ Explanation:
The sum of 3, 2 and 6 is 11.

Question 3.
5 + 1 + 3 = ___ Explanation:
The sum of 5, 1 and 3 is 9.

Write an addition fact to show the problem. Circle two addends to add first. Write the sum. Solve.

Question 4.
Use Repeated Reasoning There are 4 rulers on the art table, 6 rulers on the math table, and 3 rulers on the science table. How many rulers are there?
___ + _____ + ____ = ____
_____ rulers Explanation:
The sum of 4, 6 and 3 is 13
There are 13 rulers.

Question 5.
Use Structure Nico folds 3 blue shirts, 2 red shirts, and 7 white shirts. How many shirts does Nico fold? ___ + ___ + ___ = ____
___ shirts Explanation:
The sum of 3, 2 and 7 is 12
Nico folded 12 shirts.

Question 6.
7 + 2 + 2 = ___ Explanation:
The sum of 7, 2 and 2 is 11.

Question 7.
0 + 6 + 9 = ___ Explanation:
The sum of 0, 6 and 9 is 15.

Question 8.
5 + 0 + 7 = ___ Explanation:
The sum of 5, 0 and 7 is 12.

Question 9.
4 + 5 + 1 = ___ 