Practice the questions of **McGraw Hill Math Grade 4 Answer Key** **PDF Chapter 6 Lesson 5 Using Mental Math to Divide** to secure good marks & knowledge in the exams.

## McGraw-Hill Math Grade 4 Answer Key Chapter 6 Lesson 5 Using Mental Math to Divide

**Divide**

**Use mental math to find each quotient.**

Question 1.

18 ÷ 9 = __2__

Answer:

18 ÷ 9 = __2__

Explanation:

Multiplication and division are inversely proportional

9 x 2 = 18

Question 2.

180 ÷ 9 = ___

Answer:

180 ÷ 9 = 20

Explanation:

Multiplication and division are inversely proportional

9 x 2 = 18

adding the zero

Question 3.

1,800 ÷ 9 = ____

Answer:

1,800 ÷ 9 = 200

Explanation:

Multiplication and division are inversely proportional

9 x 2 = 18

adding the zeros

Question 4.

14 ÷ 2 = ___

Answer:

14 ÷ 2 = 7

Explanation:

Multiplication and division are inversely proportional

2 x 7 = 14

Question 5.

140 ÷ 2 = ___

Answer:

140 ÷ 2 = 70

Explanation:

Multiplication and division are inversely proportional

2 x 7 = 14

adding the zeros

Question 6.

1,400 ÷ 2 = ___

Answer:

1,400 ÷ 2 = 700

Explanation:

Multiplication and division are inversely proportional

2 x 7 = 14

adding the zeros

Question 7.

360 ÷ 6 = ___

Answer:

360 ÷ 6 = 6

Explanation:

Multiplication and division are inversely proportional

6 x 6 = 36

adding the zeros

Question 8.

450 ÷ 5 = ___

Answer:

450 ÷ 5 = 90

Explanation:

Multiplication and division are inversely proportional

5 x 9 = 45

adding the zeros

Question 9.

320 ÷ 8 = ___

Answer:

320 ÷ 8 = 40

Explanation:

Multiplication and division are inversely proportional

8 x 4 = 32

adding the zeros

Question 10.

Kaylee used a basic fact to find the quotient for 180 ÷ 6. Write the division sentence of the basic fact she used.

Answer:

6 x 3 = 18

180 ÷ 6 = 30

Explanation:

Multiplication and division are inversely proportional

18 ÷ 6 = 3