All the solutions provided in **McGraw Hill Math Grade 1 Answer Key PDF Chapter 7 Lesson 2 Adding Three Numbers** as per the latest syllabus guidelines.

## McGraw-Hill Math Grade 1 Answer Key Chapter 7 Lesson 2 Adding Three Numbers

**Add**

**Write the sum.**

Question 1.

(2 + 1) + 4 = __7__

2 + (1 + 4) = __7
__Explanation:

__Changing the order of addends does not change the sum.__

According to the Commutative property

Question 2.

(5 + 3) + 1 = ___

5 + (3 + 1) = ___

Answer:

(5 + 3) + 1 = 8 + 1 = 9

5 + (3 + 1) = 5 + 4 = 9

Explanation:__
__ Changing the order of addends does not change the sum.

According to the Commutative property

Question 3.

(2 + 4) + 2 = ___

2 + (4 + 2) = ___

Answer;

(2 + 4) + 2 = 6 + 2 = 8

2 + (4 + 2) = 2 + 6 = 8

Explanation:__
__ Changing the order of addends does not change the sum.

According to the Commutative property

Question 4.

(1 + 5) + 7 = ____

1 + (5 + 7) = ___

Answer:

(1 + 5) + 7 = 6 + 7 = 13

1 + (5 + 7) = 1 + 12 = 13

Explanation:__
__ Changing the order of addends does not change the sum.

According to the Commutative property