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