# Multiplying Decimals by Whole Numbers Worksheet

Multiplying Decimals by Whole Numbers Worksheet
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2.
Arthur charges $10.55 to install a software in a PC. How much does he earn, if he installs the software in 5 PCs?  a.$51.75 b. $52.75 c.$53.75 d. $54.75 #### Solution: Charges for the installation in 5 PCs = Charges for the installation in one PC × 5 10.55 × 5 ........ 52.75 ........ [2 decimal places.] [No decimal place.] [2 decimal places.] Arthur earns$52.75 if he installs the same software in 5 PCs.

3.
A bag of tomatoes weighs 5.44 grams. Find the weight of 14 bags of tomatoes.

 a. 76.16 grams b. 74.16 grams c. 77.16 grams d. 75.16 grams

#### Solution:

Weight of 14 bags = Weight of one bag × 14.

5.44
× 14
.........
76.16
.........

Weight of 14 such bags is 76.16 grams.

4.
A container can hold 24.61 pints of oil. How much oil can 42 containers hold?

 a. 991.62 pints b. 1033.62 pints c. 1075.62 pints d. None of the above

#### Solution:

Quantity of oil that 42 containers can hold = (Quantity of oil in a single container) × 42.

24.61
×42
.........
1033.62
.........

[2 decimal places.]
[No decimal place.]

[2 decimal places.]

42 containers can hold 1033.62 pints of oil.

5.
A metal rod was cut into 2 equal parts, each of length 3.25 m. Find the original length of the metal rod.
 a. 8.8 m b. 6.5 m c. 6.7 m d. 6.3 m

#### Solution:

Length of the original metal rod = Length of one part of the rod × 2

3.25
×2
...........
6.50
............

[2 decimal places.]
[No decimal places.]

[2 decimal places.]

The length of the original metal rod is 6.5 m.

6.
Mr. Justin's family consumes 2.38 gallons of cooking oil per month. How much cooking oil do they consume in a year?

 a. 16.56 gallons b. 52.56 gallons c. 28.56 gallons d. 40.56 gallons

#### Solution:

Consumption of cooking oil in a year = Consumption of cooking oil per month × 12

2.38
× 12
........
28.56
........

[2 decimal places.]
[No decimal places.]

[2 decimal places.]

Justin's family consumes 28.56 gallons of cooking oil in a year.

7.
Tony, a fashion designer, uses 3.9 m of a fabric to make an exclusive outfit. How much fabric does he need to make 9 such outfits?
 a. 35.1 m b. 36.1 m c. 34.1 m d. 37.1 m

#### Solution:

Fabric needed to make 9 outfits = Fabric needed to make one outfit × 9

3.9
× 9
..........
35.1
..........

[1 decimal place.]
[No decimal place.]

[1 decimal place.]

Tony needs 35.1 m of fabric to make 9 such outfits.

8.
Jimmy saves $10.30 from his weekly earnings. How much would he save in 4 weeks, if he manages to save all that amount each week?  a.$41.20 b. $42.20 c.$39.20 d. $40.20 #### Solution: Total savings in the month = Savings in a week × 4 = 10.30 × 4 =$41.20

9.
A playground in the shape of a square is 24.2 ft long. Find the perimeter of the playground.
 a. 96.8 ft b. 94.8 ft c. 97.8 ft d. 98.8 ft

#### Solution:

Perimeter of a square = 4 × side of a square
[Write the formula.]

Perimeter of the playground = 4 × side of the playground

24.2
×   4
............
96.8
............

[1 decimal place.]
[No decimal place.]

[1 decimal place.]

Perimeter of the playground is 96.8 ft.

10.
A carpenter made a circular bed with a radius of 2.3 ft. What is the diameter of the bed?
 a. 4.6 ft b. 4.7 ft c. 4.5 ft d. 4.4 ft

#### Solution:

Diameter of a circle = 2 × (radius of the circle)

Diameter of the bed = 2 × (radius of the bed)

2.3
×  2
...........
4.6
............

[1 decimal place.]
[No decimal place.]

[1 decimal place.]

Diameter of the bed is 4.6 ft.