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## McGraw-Hill Math Grade 3 Answer Key Chapter 2 Lesson 5 Fact Families

**Solve**

**Complete the fact family.**

Question 1.

14 + 3 = __17__

__3__ + __14__ = __17__

__17__ – __14__ = __3__

__17__ – __3__ = __14__

Question 2.

19 – 3 = ____

___ – ____ = ____

___ + ____ = ____

___ + ____ = ____

Answer:

19 -3 = 16

19 – 16 = 3

16 + 3 = 19

3 + 16 = 19

Explanation:

Some addition and subtraction facts use the same numbers

They are called fact family

I wrote the fact family for the numbers 19, 3 and 16.

Question 3.

Write the fact family that includes 9, 3, and 6.

__ + __ = __ – __ = __

__ + __ = __ – __ = __

Answer:

6 + 3 = 9

3 + 6 = 9

9 – 3 = 6

9 – 6 = 3

Explanation:

Some addition and subtraction facts use the same numbers

They are called fact family

I wrote the fact family for the numbers 9, 3 and 6.

Question 4.

Write the fact family that includes 8, 7, and 1.

__ + __ = __ __ – __ = ___

__ + __ = __ __ – __ = ___

Answer:

1 + 7 = 8

7 + 1 = 8

8 – 1 = 7

8 – 7 = 1

Explanation:

Some addition and subtraction facts use the same numbers

They are called fact family

I wrote the fact family for the numbers 8, 7 and 1.

Question 5.

The sums are 6. One difference is 2. What is the third number of this fact family?

Answer:

4 is the other number in this fact family

Explanation:

Given that sums are 6

One number is 2

So, subtract 2 from 6

The other number is 4.