Multiple-Choice Questions or Objective Type Questions on Decimals [PDF Included]

Here, I will display some Multiple-Choice questions on Decimals. If you are looking for MCQ on Decimals, this is the best place where you will get a lot of multiple-choice questions.

Introduction

Decimals are numbers that help us represent values smaller than one. They are used in money, measurements, and daily life, making them very important for students to understand.

What is a Decimal?

A decimal is a way to write fractions using powers of ten. For example, 0.5 means 5 parts out of 10. The dot between numbers is called a decimal point. Decimals are used in science, shopping, engineering, and everywhere we need accuracy.

Origin of Decimals

The decimal system started in ancient India. The word “decimal” comes from the Latin word “decem,” meaning ten. Our modern number system is called the base-10 system because it is built on powers of ten.

Explanation of Decimals

Imagine you have 1 whole chocolate bar.
If you cut it into 10 equal pieces, each piece is 1/10 of the chocolate. In numbers, that’s written as 0.1.

A decimal number is just a way of showing parts of a whole using a dot (.) called the decimal point.

Example:

• 0.5 means 5 out of 10 parts → Half a chocolate.
• 0.25 means 25 out of 100 parts → A quarter of a chocolate.

Key Idea:

• Numbers before the dot are whole numbers.
• Numbers after the dot are fractions in disguise.

Decimal Place Values:

Adding Decimals (Step-by-Step)

1. Write numbers in a column and line up the dots.
   Example:

  2.45  

+ 1.3  

• Add zeros if needed:

 2.45  

+1.30  

• Add like whole numbers:

  2.45  

+ 1.30  

------  

  3.75  

✅ Answer is 3.75.

➖ Subtracting Decimals

1. Line up the decimal points.
2. Add zeros if needed.
3. Subtract like whole numbers.

Example: 5.6 - 2.45

  5.60  

- 2.45  

------  

  3.15  

✅ Answer is 3.15.

✖️ Multiplying Decimals

1. Ignore the dots and multiply normally.
2. Count decimal places in both numbers.
3. Place the decimal in the answer.

Example: 0.3 × 0.4

3 × 4=12  

There are2decimal places (1ineach number).  

Put decimal2 places fromright: 0.12  

✅ Answer is 0.12.

➗ Dividing Decimals

1. Make the divisor (the number you divide by) a whole number by moving the dot.
2. Move the dot in the other number the same way.
3. Divide as usual.

Example: 1.5 ÷ 0.5

Move dot: 1.5 ÷ 0.5 → 15 ÷ 5 = 3  

✅ Answer is 3.

Super Simple Trick to Remember:

• Add/Subtract → Line up the dots.
• Multiply→ Ignore dots, then count decimal places.
• Divide → Move dots to make the divisor a whole number.

At the end of this article, you can download the PDF format of this MCQ sheet. Now, let us move on to MCQ questions.

MCQ Questions on Decimals

What is the decimal of ½?
A) 0.2
B) 0.25
C) 0.5
D) 0.75
Answer: C) 0.5

What is the base of the decimal system?
A) 5
B) 10
C) 12
D) 20
Answer: B) 10

What is 0.25 equal to?
A) 1/2
B) 1/4
C) 1/5
D) 1/10
Answer: B

Which is greater: 0.6 or 0.56?
A) 0.6
B) 0.56
C) Both are equal
D) Cannot say
Answer: A

0.75 As a fraction is:
A) 3/5
B) 3/4
C) 1/3
D) 5/6
Answer: B

Add 3.45 + 2.1.
A) 5.55
B) 5.50
C) 5.65
D) 5.45
Answer: A

Subtract 5.6 – 2.45.
A) 3.05
B) 3.10
C) 3.15
D) 3.20
Answer: C

Multiply 0.3 × 0.4.
A) 0.12
B) 0.7
C) 1.2
D) 0.04
Answer: A

1.5 ÷ 0.5 equals:
A) 0.3
B) 3
C) 2
D) 1.5
Answer: B

·  Which decimal is smallest?
A) 0.09
B) 0.099
C) 0.9
D) 0.19
Answer: A

Convert 7/10 to decimal.
A) 0.07
B) 0.70
C) 0.7
D) B and C
Answer: D

Round 3.476 to 2 decimal places.
A) 3.47
B) 3.48
C) 3.46
D) 3.50
Answer: B

0.125 As a fraction is:
A) 1/4
B) 1/5
C) 1/8
D) 1/2
Answer: C

Divide 4.8 ÷ 0.2.
A) 24
B) 2.4
C) 20
D) 22
Answer: A

Place value of 7 in 3.478:
A) Tenths
B) Hundredths
C) Thousandths
D) Units
Answer: B

Which is NOT a decimal?
A) 5.25
B) 0.003
C) 1/2
D) 7.0
Answer: C

0.333... represents:
A) 1/2
B) 1/3
C) 3/10
D) 3/4
Answer: B

Quiz Questions on Decimals

Here is the Quiz for you for Grade 5:

Conclusion

I hope that the MCQ questions on Decimals will help you in clearing the concept. I believe that explaining the topic through a series of questions will help develop your interest in it. You can write your questions/ queries on multiple-choice questions on Decimals so that I can clarify those also. Thank you.