Practice the problems of Math in Focus Grade 3 Workbook Answer Key Chapter 8 Practice 1 Mental Division to score better marks in the exam.

## Math in Focus Grade 3 Chapter 8 Practice 1 Answer Key Mental Division

**Think of the multiplication facts for 6, 7, 8, and 9. Then fill in the blanks.**

Example

__6__ × 6 = 36 36 ÷ 6 = __6__

Question 1.

___ × 7 = 35 35 ÷ 7 = ____

Answer:

5 × 7 = 35 35 ÷ 7 = 5

Explanation:

The inverse or opposite of division is multiplication.

It is called an Inverse operation

Question 2.

___ × 8 = 72 72 ÷ 8 = ____

Answer:

9 × 8 = 72 72 ÷ 8 = 9

Explanation:

The inverse or opposite of division is multiplication.

It is called an Inverse operation

Question 3.

___ × 9 = 63 63 ÷ 9 = ____

Answer:

7 × 9 = 63 63 ÷ 9 = 7

Explanation:

The inverse or opposite of division is multiplication.

It is called an Inverse operation

Question 4.

___ × 9 = 81 81 ÷ 9 = ____

Answer:

9 × 9 = 81 81 ÷ 9 = 9

Explanation:

The inverse or opposite of division is multiplication.

It is called an Inverse operation

**Fill in the blanks**

Question 5.

56 ÷ 7 = __ ones ÷ 7

= ___ ones

= _____

Answer:

56 ÷ 7 = 56 ones ÷ 7

= 8 ones

= 8

Explanation:

We have to convert the tens and ones to ones

as the tens cannot be divided directly

Question 6.

360 ÷ 9 = ___ tens ÷ 9

= ___ tens

= _____

Answer:

360 ÷ 9 = 36 tens ÷ 9

= 4 tens

= 40

Explanation:

We have converted the hundreds to tens

To make the division easier

Question 7.

600 ÷ 3 = ___ hundreds ÷ 3

= ____ hundreds

= ______

Answer:

600 ÷ 3 = 6 hundreds ÷ 3

= 2 hundreds

= 200

Explanation:

We have converted the 600 to ones

To make the division easier

Question 8.

4,500 ÷ 5 = ___ hundreds ÷ 5

= ___ hundreds

= ____

Answer:

4,500 ÷ 5 = 45 hundreds ÷ 5

= 9 hundreds

= 900

Explanation:

We have converted the 4500 to hundreds

To make the division easier

**Divide. Use related multiplication facts and patterns to help you.**

Question 9.

240 ÷ A = ___

Answer:

240 ÷ 4 = 60

Explanation:

Converted the number 240 to 24 tens

4 x 6 = 24

Question 10.

250 ÷ 5 = ____

Answer:

250 ÷ 5 = 50

Explanation:

Converted the number 250 to 25 tens

5 x 5 = 25

Question 11.

180 ÷ 9 = ___

Answer:

180 ÷ 9 = 20

Explanation:

Converted the number 180 to 18 tens

9 x 2 = 18

Question 12.

180 ÷ 6 = ___

Answer:

Question 12.

180 ÷ 6 = 30

Explanation:

Converted the number 180 to 18 tens

6 x 3 = 18

Question 13.

320 ÷ 8 = ___

Answer:

320 ÷ 8 = 40

Explanation:

Converted the number 320 to 32 tens

8 x 4 = 32

Question 14.

490 ÷ 7 = ___

Answer:

490 ÷ 7 = 70

Explanation:

Converted the number 490 to 49 tens

7 x 7 = 49