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

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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
1714 = 3
173 = 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.

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