# McGraw Hill My Math Grade 2 Chapter 1 Lesson 12 Answer Key Fact Families

All the solutions provided in McGraw Hill Math Grade 2 Answer Key PDF Chapter 1 Lesson 12 Fact Families will give you a clear idea of the concepts.

## McGraw-Hill My Math Grade 2 Answer Key Chapter 1 Lesson 12 Fact Families

Explore and Explain

Teacher Directions: Roll a red number cube two times to find two addends. Write the numbers at the bottom of the triangle. Write the sum at the top of the triangle. Use the numbers to write related number sentences. Repeat for the other triangle.

Explanation:
the sum remains the same
By using the facts we are finding the difference of the addition facts

See and Show

A fact family, is a set of related facts using the same three numbers. The numbers in this fact family are 12, 9, and 3.

Use related tacts to complete fact Families.

Complete each fact family.

Question 1.

9 + 7 = ___
7 + 9 = ___
16 – 9 = ____
16 – 7 = ____
9 + 7 = 16
7 + 9 = 16
16 – 9 = 7
16 – 7 = 9
Explanation:
the sum remains the same
By using the facts we are finding the difference of the addition facts

Question 2.

9 + 8 = ___
____ + ____ = ____
17 – 9 = ____
____ – ____ = ____
9 + 8 = 17
8 + 9 = 17
17 – 9 = 8
17 – 8 = 9
Explanation:
the sum remains the same
By using the facts we are finding the difference of the addition facts

Talk Math
What are the related facts in the fact family 9, 9, 18? Explain.
9 + 9 = 18
18 – 9 = 9
Explanation:
the sum remains the same
By using the facts we are finding the difference of the addition facts

Each fact in a fact family uses the same three numbers.

On My Own

Complete each fact family.

Question 3.

____ + ____ = ____
____ + ____ = ____
____ – ____ = ____
____ – ____ = ____
8 + 6 = 14
6 + 8 = 14
14 – 8 = 6
14 – 6 = 8
Explanation:
the sum remains the same
By using the facts we are finding the difference of the addition facts

Question 4.

____ + ____ = ____
____ + ____ = ____
____ – ____ = ____
____ – ____ = ____
8 + 5 = 13
5 + 8 = 13
13 – 8 = 5
13 – 5 = 8
Explanation:
the sum remains the same
By using the facts we are finding the difference of the addition facts

Question 5.

____ + ____ = ____
____ + ____ = ____
____ – ____ = ____
____ – ____ = ____
7 + 3 = 10
3 + 7 = 10
10 – 3 = 7
10 – 7 = 3
Explanation:
the sum remains the same
By using the facts we are finding the difference of the addition facts

Question 6.

____ + ____ = ____
____ + ____ = ____
____ – ____ = ____
____ – ____ = ____
9 + 6 = 15
6 + 9 = 15
15 – 9 = 6
15 – 6 = 9
Explanation:
the sum remains the same
By using the facts we are finding the difference of the addition facts

Problem Solving

Solve.

Question 7.
Linda has 7 fish. She has 5 crabs. How many animals does Linda have?
_____ animals

12 animals
Explanation:
Linda has 7 fish.
She has 5 crabs.
7 + 5 = 12
12 animals that Linda have.

Question 8.
There are 8 apples in one basket. The second basket has one more than the first. How many apples are there in all?
_____ apples
17  apples
Explanation:
There are 8 apples in one basket.
The second basket has one more than the first.
8 + 1 = 9
8 + 9 = 17
17  apples are there in all.

Question 9.
11 children were on the playground. 3 more children came to the playground. How many children are on the playground now?
_____ children
14 children
Explanation:
11 children were on the playground.
3 more children came to the playground.
11 + 3 = 14
14 children are on the playground now.

HOT Problems Make a fact family. Use at least one two-digit number.

Explanation:

We are using 12 as one 2 digit number.
12 + 2 = 14
2 + 12 = 14
14 – 2 = 12
14 – 12 = 2

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