Estimating with Decimals, Fractions, and Percentages
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Estimating with Decimals, Fractions, and Percentages
Estimation for Year 6: ten problems with decimals, fractions, percentages, and money, such as a discount, a shared bill, change from $50, and fuel for a trip, each with three estimates to choose from. With an answer key.
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- Pages
- 1
- Last updated
- Time
- About 20 minutes
- Answer key
- Included
- Printing
- Black and white
- Related curriculum
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Round the numbers or use compatible numbers to estimate a sum, difference, product or quotient, and use the estimate to check whether an exact answer is reasonable.
Reviewed by Mr. Daniel Carter, Teacher. How we check worksheets
How to use this sheet
- Have the child round every number first and write the rounded problem above the real one.
- Ask whether the estimate should be more or less than the exact answer, and why, before working it out.
- Use the estimate to check an exact answer. If they are far apart, look for a slip in the exact work.
Common mistakes
- Working the exact answer first and then rounding it. That skips the point of estimating.
- Rounding to the wrong place, such as to the nearest ten when the question asks for hundreds. Underline the place first.
- Thinking an estimate is wrong because it is not exact. A good estimate is close, and quick to find.
