### GCSE Maths

Numbers
Algebra
Geometry and Measures
Probability
Statistics

# Significant Figures

Significant figures are the number of digits in a number that indicate its degree of accuracy. Here are some rules to determine the significant figures in a given number:

• All non-zero digits are significant. For example: have significant figures each.
• All zeros between non-zero digits are significant. For example: have significant figures each.
• All zeros at the end of a decimal are significant. For example: have significant figures each.
• All zeros in front of non-zero digits are not significant. For example: have significant figures each.

## Examples and Solutions

Example 1:

Using a calculator, find the value of the following and give answers to decimal places and significant figures:

• • • Using a calculator, we find To decimal places, this is .

To significant figures, this is .

Using a calculator, we find To decimal places, this is .

To significant figures, this is .

Using a calculator, we find To decimal places, this is .

To significant figures, this is .

Example 2:

Using a calculator, find the value of the following and give answers to decimal places and significant figures:

• • • Using a calculator, we find To decimal places, this is .

To significant figures, this is .

Using a calculator, we find To decimal places, this is .

To significant figures, this is .

Using a calculator, we find To decimal places, this is .

To significant figures, this is .

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