Rounding decimals to significant figures
I can round decimals to a required number of significant figures.
Rounding decimals to significant figures
I can round decimals to a required number of significant figures.
Lesson details
Key learning points
- Numbers bigger than 1 with decimals places can be rounded to significant figures.
- When working with numbers smaller than one it is important to carefully identify the first significant figure.
- Once the first significant figure is identified you can find any significant figure.
- It is important to know when zeros are and are not significant.
Common misconception
Assuming all zero digits are not significant.
Designing questions that contain zero digits in a variety of positions.
Keywords
Significant figure - Significant figures are the digits in a number that contribute to the accuracy of the number. The first significant figure is the first non-zero digit.
Round - To change a number into another number that is approximately the same value but is easier to work with. E.g. round 561 to the nearest 10 is 560.
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Video
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Starter quiz
6 Questions
5 is the second significant figure
5 is the fourth significant figure
5 is the first significant figure
5 is the fifth significant figure
5 is the third significant figure
Exit quiz
6 Questions
5 is the first significant figure
2 is the first significant figure
4 is the first significant figure
7 is the first significant figure
3 is the first significant figure