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:

We can add the addends in any way but,

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.

**Helpful Hint**

Use related tacts to complete fact Families.

**Complete each fact family.**

Question 1.

9 + 7 = ___

7 + 9 = ___

16 – 9 = ____

16 – 7 = ____

Answer:

9 + 7 = 16

7 + 9 = 16

16 – 9 = 7

16 – 7 = 9

Explanation:

We can add the addends in any way but,

the sum remains the same

By using the facts we are finding the difference of the addition facts

Question 2.

9 + 8 = ___

____ + ____ = ____

17 – 9 = ____

____ – ____ = ____

Answer:

9 + 8 = 17

8 + 9 = 17

17 – 9 = 8

17 – 8 = 9

Explanation:

We can add the addends in any way but,

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:

We can add the addends in any way but,

the sum remains the same

By using the facts we are finding the difference of the addition facts

**Helpful Hint**

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

**On My Own**

**Complete each fact family.**

Question 3.

____ + ____ = ____

____ + ____ = ____

____ – ____ = ____

____ – ____ = ____

Answer:

8 + 6 = 14

6 + 8 = 14

14 – 8 = 6

14 – 6 = 8

Explanation:

We can add the addends in any way but,

the sum remains the same

By using the facts we are finding the difference of the addition facts

Question 4.

____ + ____ = ____

____ + ____ = ____

____ – ____ = ____

____ – ____ = ____

Answer:

8 + 5 = 13

5 + 8 = 13

13 – 8 = 5

13 – 5 = 8

Explanation:

We can add the addends in any way but,

the sum remains the same

By using the facts we are finding the difference of the addition facts

Question 5.

____ + ____ = ____

____ + ____ = ____

____ – ____ = ____

____ – ____ = ____

Answer:

7 + 3 = 10

3 + 7 = 10

10 – 3 = 7

10 – 7 = 3

Explanation:

We can add the addends in any way but,

the sum remains the same

By using the facts we are finding the difference of the addition facts

Question 6.

____ + ____ = ____

____ + ____ = ____

____ – ____ = ____

____ – ____ = ____

Answer:

9 + 6 = 15

6 + 9 = 15

15 – 9 = 6

15 – 6 = 9

Explanation:

We can add the addends in any way but,

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

Answer:

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

Answer:

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

Answer:

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