Practice the problems of Math in Focus Grade 5 Workbook Answer Key Chapter 9 Practice 2 Multiplying by Tens, Hundreds, and Thousands to score better marks in the exam.

## Math in Focus Grade 5 Chapter 9 Practice 2 Answer Key Multiplying by Tens, Hundreds, and Thousands

**Complete. Draw chips and use arrows to show how the chips move. Then fill in the blanks.**

Question 1.

Answer:

12 x 10 = 120

2 x 10 = 20

0.2 x 10 = 2

0.12 x 10 = 1.2

Explanation:

To multiply decimals, first multiply as if there is no decimal.

Next, count the number of digits after the decimal in each factor.

Finally, put the same number of digits behind the decimal in the product.

Multiply.

Question 2.

Answer: 5

Explanation:

To multiply decimals, first multiply as if there is no decimal.

Next, count the number of digits after the decimal in each factor.

Finally, put the same number of digits behind the decimal in the product.

Question 3.

Answer: 19

Explanation:

To multiply decimals, first multiply as if there is no decimal.

Next, count the number of digits after the decimal in each factor.

Finally, put the same number of digits behind the decimal in the product.

Question 4.

Answer: 34.2

Explanation:

To multiply decimals, first multiply as if there is no decimal.

Next, count the number of digits after the decimal in each factor.

Finally, put the same number of digits behind the decimal in the product.

Question 5.

Answer: 70.35

Explanation:

To multiply decimals, first multiply as if there is no decimal.

Next, count the number of digits after the decimal in each factor.

Finally, put the same number of digits behind the decimal in the product.

Question 6.

10 × 7.9 = ___

Answer:79

Explanation:

To multiply decimals, first multiply as if there is no decimal.

Next, count the number of digits after the decimal in each factor.

Finally, put the same number of digits behind the decimal in the product.

Question 7.

10 × 4.8 = ___

Answer: 48

Explanation:

To multiply decimals, first multiply as if there is no decimal.

Next, count the number of digits after the decimal in each factor.

Finally, put the same number of digits behind the decimal in the product.

Question 8.

10 × 27.54 = ___

Answer: 275.4

Explanation:

To multiply decimals, first multiply as if there is no decimal.

Next, count the number of digits after the decimal in each factor.

Finally, put the same number of digits behind the decimal in the product.

Question 9.

10 × 12.009 = ____

Answer: 120.09

Explanation:

To multiply decimals, first multiply as if there is no decimal.

Next, count the number of digits after the decimal in each factor.

Finally, put the same number of digits behind the decimal in the product.

Question 10.

0.7 × ___ = 7

Answer: 10

0.7 x 10 = 7

Explanation:

To multiply decimals, first multiply as if there is no decimal.

Next, count the number of digits after the decimal in each factor.

Finally, put the same number of digits behind the decimal in the product.

Question 11.

15.72 × ___ = 157.2

Answer: 10

15.72 x 10 = 157.2

Explanation:

To multiply decimals, first multiply as if there is no decimal.

Next, count the number of digits after the decimal in each factor.

Finally, put the same number of digits behind the decimal in the product.

Question 12.

10 × ___ = 534.2

Answer: 534.2

10 x 53.42

Explanation:

To multiply decimals, first multiply as if there is no decimal.

Next, count the number of digits after the decimal in each factor.

Finally, put the same number of digits behind the decimal in the product.

Question 13.

___ × 10 = 19.07

Answer: 1.907

1.907 x 10 = 190.7

Explanation:

To multiply decimals, first multiply as if there is no decimal.

Next, count the number of digits after the decimal in each factor.

Finally, put the same number of digits behind the decimal in the product.

**Complete**

Example

8 × 50 = (8 × __5__) × 10

= __40__ × 10

= __400__

So, 8 × 50 = __400__

Question 14.

0.8 × 50 = (0.8 × 5) × ___

= ___ × 10

= ____

So, 0.8 × 50 = ___

Answer:

0.8 × 50 = (0.8 × 5) × 10

= 4.0 × 10

= 40

So, 0.8 × 50 = 40

Explanation:

To multiply decimals, first multiply as if there is no decimal.

Next, count the number of digits after the decimal in each factor.

Finally, put the same number of digits behind the decimal in the product.

Question 15.

0.88 × 50 = (0.88 × ___) × 10

= ___ × 10

= ____

So, 0.88 × 50 = ___

Answer:

0.88 × 50 = (0.88 × 5) × 10

= 4.4 × 10

= 44

So, 0.88 × 50 = 44

Explanation:

To multiply decimals, first multiply as if there is no decimal.

Next, count the number of digits after the decimal in each factor.

Finally, put the same number of digits behind the decimal in the product.

**Find each product.**

Question 16.

0.9 × 40 = ____

Answer:

0.9 × 40 = (0.9 × 4) × 10

= 3.6 × 10

= 36

So, 0.9 × 40 = 36

Explanation:

Separate 40 as 4 ones and 1 tenths,

then multiply with ones first and later tens.

Question 17.

1.5 × 60 = ___

Answer:

1.5 × 60 = (1.5 × 6) × 10

= 9.0 × 10

= 90

So, 1.5 × 60 = 90

Explanation:

Separate 60 as 6 ones and 1 tenths,

then multiply with ones first and later tens.

Question 18.

0.05 × 80 = ____

Answer:

0.05 × 80 = (0.05 × 8) × 10

= 0.4 × 10

= 4

So, 0.05 × 80 = 4

Explanation:

Separate 80 as 8 ones and 1 tenths,

then multiply with ones first and later tens.

Question 19.

9.17 × 70 = ___

Answer:

9.17 x 70 = (9.17 x 7) x 10

=64.19 x 10

=641.9

So, 9.17 x 70 = 641.9

Explanation:

Separate 70 as 7 ones and 1 tenths,

then multiply with ones first and later tens.

Question 20.

6.358 × 30 = ___

Answer:

6.358 x 30 = (6.358 x 3) x 10

=19.074 x 10

=190.74

So,6.358x 30 = 190.74

Explanation:

Separate 30 as 3 ones and 1 tenths,

then multiply with ones first and later tens.

Question 21.

34.6 × 50 = ____

Answer:

34.6 x 50 = (34.6 x 5) x 10

= 173 x 10

= 1730

So, 34.6 x 50 =1730

Explanation:

Separate 50 as 5 ones and 1 tenths,

then multiply with ones first and later tens.

Question 22.

41.32 × 60 = ___

Answer:

41.32 x 60 = (41.32 x 6) x 10

= 247.92 x 10

= 2479.2

So, 41.32 x 60= 2479.2

Explanation:

Separate 60 as 6 ones and 1 tenths,

then multiply with ones first and later tens.

Question 23.

23.05 × 40 = ___

Answer:

23.05 x 40 = (23.05 x 4) x 10

=92.2 x 10

=922

So, 23.05 x 40 = 92.2

Explanation:

Separate 40 as 4 ones and 1 tenths,

then multiply with ones first and later tens.

Question 24.

Answer: 130

Explanation:

1.3 x 100 = (1.3 x10) x 10

=13 x 10

=130

So, 1.3 x 100 = 130

Question 25.

Answer: 680

Explanation:

6.8 x 100 = (6.8 x 10) x 10

= 68 x 10

= 680

So, 6.8 x 100 = 680

Question 26.

Answer: 419.6

Explanation:

4.196 x 100 = (4.196 x 10) x 10

= 41.96 x 10

= 419.6

So, 4.196 x 100 = 419.6

Question 27.

Answer: 7430

Explanation:

74.3 x 100 = (74.3 x 10) x 10

= 743 x 10

= 7430

So, 74.3 x 100 = 7430

Question 28.

46.8 × 1oo = ______

Answer: 4680

Explanation:

46.8 x 100 = (46.8 x 10) x 10

=468 x 10

= 4680

Question 29.

4.68 × 100 = ___

Answer: 468

Explanation:

4.68 x 100 = (4.68 x 10) x 10

=46.8 x 10

= 468

So, 4.68 x 100 = 468

Question 30.

5.095 × 100 = ______

Answer: 509.5

Explanation:

5.095 x 100 = (5.095 x 10 )x 10

= 50.95 x 10

= 509.5

So, 5.095 x 100 = 509.5

Question 31.

100 × 50.95 = ____

Answer: 5095

Explanation:

50.95 x 100 = (50.95 x 10) x 10

= 509.5 x 10

= 5095

So, 50.95 x 100 = 5095

**Multiply.**

Question 32.

Answer: 1800

Explanation:

1.8 x 1000 = (1.8 x 10) x 10 x 10

= 18 x 10 x 10

=180 x 10

=1800

So, 1.8 x 1000 = 1800

Question 33.

Answer: 2100

Explanation:

2.1 x 1000 = (2.1 x 10) x 10 x 10

=21 x 10 x 10

= 210 x 10

= 2100

So, 2.1 x 1000 = 2100

Question 34.

Answer: 9097

Explanation:

9.097 x 1000 = (9.097 x 10) x 10 x 10

=90.97 x 10 x 10

= 909.7 x 10

=9097

So, 9.097 x 1000 = 9097

Question 35.

Answer: 7007

Explanation:

7.007 x 1000 = (7.007 x 10) x 10 x 10

= 70.07 x 10 x 10

= 700.7 x 10

= 7007

So, 7.007 x 1000 = 7007

Question 36.

2.74 × 1,000 = ______

Answer: 2740

Explanation:

2.74 x 1000= (2.74 x 10) x 10 x 10

=27.4 x 10 x 10

=274 x 10

= 2740

Question 37.

27.4 × 1,000 = ____

Answer: 27400

Explanation:

27.4 x 1000 = (27.4 x 10) x 10 x 10

=274 x 10 x10

=2740 x 10

27400

Question 38.

1,000 × 10.81 = ______

Answer: 10810

Explanation:

10.81 x 1000 =(10.81 x 10) x 10 x 10

= 108.1 x10 x 10

= 1081 x 10

= 10810

So, 10.81 x 1000 = 10810

Question 39.

108.1 × 1,000 = ____

Answer: 108100

Explanation:

108.1 x1000 =(108.1 x 10) x 10 x 10

= 1081 x 10 x 10

= 10810 x 10

= 108100

So, 108.1 x 1000 = 108100

**Complete.**

Example

1.2 = 0.12 × __10__

= 0.012 × __100__

Question 40.

360 = 36 × ____

= 3.6 × ____

= 0.36 × _____

Answer:

360 = 36 × 10

= 3.6 × 100

= 0.36 × 1000

Explanation:

To multiply decimals, first multiply as if there is no decimal.

Next, count the number of digits after the decimal in each factor.

Finally, put the same number of digits behind the decimal in the product.

Question 41.

438 = __ × 10

= ___ × 100

= ___ × 1,000

Answer:

438 = 43.8 × 10

= 4.38 × 100

=0.438 × 1,000

Explanation:

To multiply decimals, first multiply as if there is no decimal.

Next, count the number of digits after the decimal in each factor.

Finally, put the same number of digits behind the decimal in the product.

Question 42.

7,256 = ______ × 10

= ____ × 100

= ____ × 1,000

Answer:

7,256 = 725.6 × 10

= 72.56 × 100

= 7.256 × 1,000

Explanation:

To multiply decimals, first multiply as if there is no decimal.

Next, count the number of digits after the decimal in each factor.

Finally, put the same number of digits behind the decimal in the product.

**Multiply.**

Example

0.3 × 700 = (0.3 × 7) × 1oo

= __2.1__ × 1oo = __210__

So, 0.3 × 700 = __210__

Question 43.

0.003 × 700 = (0.003 × __) × 100

= ____ × 1oo = ____

So, 0.003 × 700 = ___.

Answer:

0.003 × 700 = (0.003 × 7) × 100

= 0.021 × 1oo = 2.1

So, 0.003 × 700 = 2.1.

Explanation:

The place value of a number is the value represented by a digit in a number based on its position in the number.

While a place value is the value a digit holds to be at the place in the number, on the other hand.

First separate the hundredth place value,

and multiply the given numbers with the number .

Question 44.

0.03 × 2,000 = (0.03 × __) × 1,000

= ______ × 1,000 = ______

So, 0.03 × 2,000 = ____.

Answer:

0.03 × 2,000 = (0.03 × 2) × 1,000

= 0.06 × 1,000 = 60

So, 0.03 × 2,000 = 60.

Explanation:

The place value of a number is the value represented by a digit in a number based on its position in the number.

While a place value is the value a digit holds to be at the place in the number, on the other hand.

First separate the place value,

and multiply the given numbers with the number .

Question 45.

0.003 × 2,000 = (0.003 × __________) × 1,000

= __________× 1,000 = _______.

So, 0.003 × 2000 = __________.

Answer:

0.003 × 2,000 = (0.003 × 2) × 1,000

= 0.006× 1,000 = 6

So, 0.003 × 2000 = 6.

Explanation:

The place value of a number is the value represented by a digit in a number based on its position in the number.

While a place value is the value a digit holds to be at the place in the number, on the other hand.

First separate the place value,

and multiply the given numbers with the number .

**Find each product.**

Question 46.

4.5 × 200 = _______

Answer: 900

Explanation:

(4.5 x 2) x 10 x 10

= 9 x 10 x 10

= 90 x 10

= 900

So, 4.5 x 200 = 900

Question 47.

0.49 × 300 = ___

Answer: 147

Explanation:

0.49 x 300 = (0.49 x 3) x 10 x 10

= 1.47 x 10 x 10

= 14.7 x 10

= 147

So, 0.49 x 300 = 147

Question 48.

3.148 × 500 = ______

Answer: 1,574

Explanation:

3.148 x 500 = (3.148 x 5) x 10 x 10

= 15.74 x 10 x 10

= 157.4 x 10

= 1574

So, 3.147 x 500 = 1574

Question 49.

2.27 × 700 = ___

Answer: 1,589

Explanation:

2.27 x 700 = (2.27 x 7) x 10 x 10

= 15.89 x10 x10

= 158.9 x 10

= 1589

So , 2.27 x 700 = 1589

Question 50.

900 × 3.18 ______

Answer: 2,862

Explanation:

3.18 x 900 = (3.18 x 9) x 10 x 10

= 28.62 x 10 x 10

= 286.2 x 10

= 2862

So, 3.18 x 900 = 2862

Question 51.

1.8 × 2,000 = ___

Answer: 36,00

Explanation:

1.8 x 2000 = (1.8 x 20) x 10 x 10

= 36 x 10 x 10

=360 x 10

=3600

So, 1.8 x 2000 = 3600

Question 52.

4,000 × 2.5 = _______

Answer: 10,000

Explanation:

2.5 x 4000 = (2.5 x 40) x 10 x 10

= 100 x10 x10

= 1000 x 10

= 10000

So, 2.5 x 4000 = 10000

Question 53.

72.5 × 6,000 = ___

Answer: 435,000

Explanation:

72.5 x 6000 = ( 72.5 x 60) x 10 x 10

= 4350 x10 x10

= 43500 x 10

= 435000

So, 72.5 x 6000 = 435000

Question 54.

1.75 × 8,000 = ______

Answer: 14,000

Explanation:

1.75 x 8000 = (1.75 x 80) x 10 x 10

= 140 x10 x10

= 1400 x10

= 14000

So 1.75 x 8000 = 14000

Question 55.

4.19 × 9,000 = ___

Answer: 37,710

Explanation:

4.19 x 9000 = (4.19 x90) x 10 x 10

= 377.1 x10 x10

= 3771 x 10

= 37710

So, 4.19 x 9000 = 37710