We included HMH Into Math Grade 1 Answer Key PDF Module 4 Review to make students experts in learning maths.

Concepts and Skill

Solve. Then circle the pairs that are related facts.

Question 1.
6 + 5 = ___
11 – 5 = ___

Explanation:
The three numbers used in the equations are same
So, the equations are related facts
I drew a circle around both the equations.

Question 2.
3 + 8 = __
8 – 3 = ___
3 + 8 = 11
8 – 3 = 5

Explanation:
The three numbers used in the equations are not same
So, the equations are not related facts
I did not drew a circle around both the equations.

Question 3.
5 + 7 = ___
7 – 5 = ___
5 + 7 = 12
7 – 5 = 2

Explanation:
The three numbers used in the equations are not same
So, the equations are not related facts
I did not drew a circle around both the equations.

Question 4.
9 + 6 = ___
15 – 9 = ___

Explanation:
The three numbers used in the equations are same
So, the equations are related facts
I drew a circle around both the equations.

Complete the related facts. Use if you need to.

Question 5.
5 + 9 = ___ 14 – 9 = ____
9 + __ = 14 ___ – ___ = ___

Explanation:
I used cubes to show the addition equations 5 + 9 = 14 and 9 + 5 = 14
The related facts of 5 + 9 = 14 are
14 – 9 = 5
9 + 5 = 14
14 – 5 = 9.

Question 6.
What is 12 – 4?
___ + ___ = ___
So, 12 – 4 = ___
4 + 8 = 12
So, 12 – 4 = 8

Explanation:
12 – 4 =
The addition equation that solve the problem is
4 + 8 = 12
So, 12 – 4 = 8
The difference of 12 and 4 is 8.

Question 7.
What is 16 – 9?
___ + ___ = ___
So, 16 – 9 = ___
9 + 7 = 16
So, 16 – 9 = 7

Explanation:
16 – 9 = 7
The addition equation that solve the problem is
9 + 7 = 16
So, 16 – 9 = 7
The difference of 16 and 9 is 7.

Use subtraction to find the unknown addend.

Question 8.
Solve 7 + = 16
___ – ___ = ___
7 + ___ = 16
16 – 7 = 9
7 + 9 = 16

Explanation:
7 + = 16
The subtraction equation that solve the problem is
16 – 7 = 9
So, 7 + 9 = 16
The sum of 7 and 9 is 16.

Write a related subtraction fact to solve.

Question 9.
Teresa has 8 yellow flowers. The rest of her flowers are red. She has 14 flowers altogether. How many red flowers does she have?
8 + = 14
___ – ___ = ___
8 + ___ = 14 __ red flowers
14 – 8 = 6
8 + 6 = 14
6 red flowers

Explanation:
Teresa has 8 yellow flowers
The rest of her flowers are red
She has 14 flowers altogether
8 + _ = 14
The related subtraction equation is
14 – 8 = 6
So, 8 + 4 = 14
There are 4 red flowers.

Fill in the bubble next to the correct answer.

Question 10.
Which is the difference?

A. 5
B. 6
C. 11
A. 5

Explanation:
8 – 3 =
Start at 3 count on till 8
3 after4, 5, 6, 7, 8
I counted 5 ones
So, 8 – 3 = 5.

Question 11.
Which addition equation can be used to check the answer to 15 – 7 = ?
A. 7 + 1 = 8
B. 6 + 9 = 15
C. 7 + 8 = 15
C. 7 + 8 = 15

Explanation:
The related facts will always have the same three numbers
15 – 7 =
Make 10:
15 – 7
= 15 – 5 – 2
= 10 -2
= 8
15 – 7 = 8
The equation 7 + 8 = 15 ahs the same numbers as the equation 15 – 7 = 8
So, the equation 7 + 8 = 15 is the addition equation that can be used to check the answer of 15 – 7 = 8.

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