Problem solving with estimation and rounding
I can use my knowledge of estimation and rounding to solve problems.
Problem solving with estimation and rounding
I can use my knowledge of estimation and rounding to solve problems.
Lesson details
Key learning points
- It may be helpful to estimate an answer to check the magnitude is correct.
- It can be useful to use rounding to significant figures when dealing with very big or very small numbers in context.
- Estimates can help when making decisions about maximum or minimum possible answers in real life contexts.
- You can use Fermi estimation to find approximate solutions to problems.
Common misconception
Using the wrong limits when dividing or subtracting in order to find the upper limit of a calculation or lower limit of a calculation.
Drawing a number line to show with subtraction will help students see how to achieve an upper or lower limits of an error interval calculation. When using division, reiterating the division of number is the same as multiplying by its reciprocal.
Keywords
Estimate - A quick estimate for a calculation is obtained from using approximate values, often rounded to 1 significant figure.
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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