# Rounding to Significant Figures

Suitable for Year groups: 8, 9, 10

## Rounding to Significant Figures  resource description

This example resource shows pupils what significant figures are and how to round numbers to either one or two significant figures. The numbers 1508.06 and 0.01704 and shown and labelled according to their significant figures. Then the numbers 3874m 6.254 and 0.07104 are rounded to 1 and 2 significant figures.

# Rounding Significant Figures Example

## What is the resource?

This PDF demonstrates 'significant figure' rounding using worked examples.  Designed for secondary learners encountering this concept in science and maths topics.

## Why is rounding to significant figures important?

It lets us express answers with appropriate precision, matching the context:

• Measurements & science: Equipment has its limits – overstating accuracy in a result is misleading.
• Huge quantities: 3 significant figures make big numbers like populations easier to compare quickly.
• Data presentation: Round appropriately so audiences grasp what matters with less mental 'clutter'.
• Further maths prep: Error & approximation techniques build on significant figures understanding.

## Why is this resource helpful?

This concept requires careful rules, this sheet breaks it down for easier practice:

• Clear steps: Shows HOW to identify which digits matter most – not just final answers.
• Common mistake focus: Zero placeholders get tricky - examples pinpoint where errors happen.
• Varied questions: Makes students apply the idea beyond the first rule example to check skill.
• Printable PDF: Allows teachers to use the same problems for whole class learning, or revise later.

It makes rounding accurate, not random!  Students see this as a meaningful skill for interpreting & communicating calculated results.

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