Rounding integers to one significant figure
I can round integers to one significant figure.
Rounding integers to one significant figure
I can round integers to one significant figure.
Lesson details
Key learning points
- It is possible to use rounding and place value to know the size of a number without knowing the actual number.
- The first non-zero digit of a number is the first significant figure.
- You can identify the place value of the first significant figure.
- A number can be located on a number line and numbers to 1 significant figure either side of it represented.
- Any integer can be rounded to one significant figure and a number line can help with this.
Common misconception
Assuming all zero digits are not significant.
Within the lesson there are many examples where some zeros are significant. Relate significance back to the communication of accuracy and that some digits are significant as they preserve the place value of other digits.
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).
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Starter quiz
6 Questions
Exit quiz
6 Questions
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