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If you multiply 0.234 by 100, what number do you get?

Decimal Numbers (Medium)

Decimals make sense of small numbers. In this 11 Plus Maths quiz, discover how they help describe measurements, timing, and quantities in the real world.

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Fascinating Fact:

A hummingbird’s heart beats 20.8 times per second, which means about 1248 beats in a single minute, decimals make counting life possible.

In 11 Plus Maths, decimals are used to show exact values in calculations, especially when working with measurements, money, and scientific data. They help express parts of whole numbers with precision.

Key Terms

Decimal: A number that shows parts of a whole using a point to separate whole numbers from fractions.
Place Value: The value of a digit based on its position in a number, such as tenths or hundredths.
Precision: The degree of accuracy in a number or measurement, often shown using decimals.

To explore helpful materials and courses for 11 Plus preparation, visit our Guide to 11 Plus Courses and Materials for Parents .

Frequently Asked Questions (Click to see answers)

What are decimals used for in maths?

Decimals are used to represent numbers that are not whole, such as money, measurements, and averages. They make calculations more accurate and detailed.

How do you convert decimals into fractions?

Write the decimal over its place value. For example, 0.5 becomes 5/10, which can be simplified to 1/2. It shows the same value in a different form.

Why are decimals important in the 11 Plus?

Decimals appear in many maths questions, including money, measurement, and reasoning tasks. They test accuracy and understanding of number relationships.

Try These Related Quizzes

1 .

What is 'one quarter' as a decimal?

0.35

0.45

0.25

0.5

1/4 = 0.25: divide 1 by 4

2 .

What is 'one half' as a decimal?

0.25

0.5

0.35

0.45

1/2 = 0.5: divide 1 by 2

3 .

What is 'three quarters' as a decimal?

0.85

0.65

0.75

0.25

3/4 = 0.75: divide 3 by 4

4 .

What is 'one eighth' as a decimal?

0.135

0.145

0.125

0.165

1/8 = 0.125: divide 1 by 8

5 .

What is 'one tenth' as a decimal?

0.01

0.1

0.001

0.0001

1/10 = 0.1: divide 1 by 10

6 .

If you multiply 0.234 by 10, what number do you get?

0.0234

234.0

23.4

2.34

If you multiply by 10, move the digits one place to the left

7 .

If you multiply 0.234 by 100, what number do you get?

23.4

2,340

23,400

0.00234

If you multiply by 100, move the digits two places to the left

8 .

If you divide 1.234 by 10, what number do you get?

0.01234

0.1234

0.001234

12.34

If you divide by 10, move the digits one place to the right

9 .

If you divide 1.234 by 100, what number do you get?

123.4

0.0001234

0.001234

0.01234

If you divide by 100, move the digits two places to the right

10 .

What is the correct rule for multiplying by a whole number beginning with 1 and followed by one or more zeros, e.g. multiplying by 10, 100, 1,000, ... ?

When multiplying by such a number, move the digits to the left by the same number of zeros as in the number

When multiplying by such a number, move the digits to the right by the same number of zeros as in the number

When multiplying by such a number, move the digits to the left by the same number of digits as in the number

When multiplying by such a number, move the digits to the right by the same number of digits as in the number

For example, 1,000 × 0.234 = 234: the digits have moved three places to the left = the number of zeros in one thousand. The rule for division is as follows: When dividing by such a number, move the digits to the right by the same number of zeros as in the number, e.g. 1.234 ÷ 1,000 = 0.001234: the digits have moved three places to the right = the number of zeros in one thousand

Author: Frank Evans (Specialist 11 Plus Teacher and Tutor)