Decimals Practice Questions with Solution

Question 1: Add 2.5 and 3.75

Solution:

To add 2.5 and 3.75,

Align the decimal points and add the numbers as usual:

2.5
+ 3.75
——
6.25

So, 2.5 + 3.75 = 6.25

Question 2: Subtract 1.25 from 5.8

Solution:

To subtract 1.25 from 5.8,

Align the decimal points and subtract the numbers as usual:

5.80
– 1.25
—–
4.55

So, 5.8 – 1.25 = 4.55

Question 3: Multiply 0.6 by 4

Solution:

To multiple 0.6 by 4,

Align the decimal points and multiple as shown above:

0.6
× 4
—–
2.4

So, 0.6 × 4 = 2.4

Question 4: Multiply 1.5 by 2.5.

Solution:

To multiply 1.5 by 2.5, we multiply as usual:

1.5 × 2.5 = 3.75

So, 1.5 multiplied by 2.5 equals 3.75.

Question 5: Divide 4.5 by 1.5.

Solution:

To divide 4.5 by 1.5, we divide as usual:

4.5 ÷ 1.5 = 3

So, 4.5 divided by 1.5 equals 3.

Question 6: Calculate 2/5 of 3.2.

Solution:

2/5 × 3.2 = 1.28.

So, 2/5 of 3.2 equals 1.28.

Question 7: Find the average of 1.8, 2.4, and 3.6.

Solution:

To find the average, we add the numbers and divide by the count:

1.8 + 2.4 + 3.6 = 7.8

Dividing 7.8 by 3 (the count of numbers), we get 2.6.

So, the average is 2.6.

Question 8: Convert 0.75 to a fraction.

Solution:

0.75 as a fraction is 3/4.

Question 9: Find 20% of 120.

Solution:

20% of 120 = 0.20 × 120 = 24

So, 20% of 120 is 24.

Question 10: Round 3.267 to the nearest hundredth.

Solution:

3.267 rounded to the nearest hundredth is 3.27.

Question 11: Express 0.125 as a percentage.

Solution:

0.125 as a percentage is

0.125 × 100 = 12.5%

So, 0.125 as a percentage is 12.5%.

Decimal is a numerical representation that uses a dot, which we call a decimal point, to separate the whole number part from its fractional part. The decimal numeral system is used as the standard system that is used to distinguish integer and non-integer numbers. In this series of practice questions, we’ll explore the fundamentals of decimals, including their definition, types, and applications.