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Multiplying Decimals by Whole Numbers Worksheet

Multiplying Decimals by Whole Numbers Worksheet
  • Page 1
 1.  
Ursula and her sister Emily sell chocolates. They sold $48.73 of chocolates in a week. Their sales remained same throughout the month. How much did they earn in the month?
[Take number of weeks in a month = 4.]
a.
$195.92
b.
$192.92
c.
$193.92
d.
$194.92


Solution:

Total sales in a month = Sales made in a week × 4 = $48.73 × 4 = $194.92.

So, they earned $194.92 in the month.


Correct answer : (4)
 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.


Correct answer : (2)
 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.


Correct answer : (1)
 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.


Correct answer : (2)
 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.


Correct answer : (2)
 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.


Correct answer : (3)
 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.


Correct answer : (1)
 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


Correct answer : (1)
 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.


Correct answer : (1)
 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.


Correct answer : (1)

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