Is the Answer Reasonable?
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Is the Answer Reasonable?
Is the answer reasonable? Estimation worksheet for Grades 3 and 4: eight worked answers, such as 48 × 6 + 215 = 503. Round to estimate, then circle Yes or No. Half are right. With an answer key.
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Teach it first
Is the Answer Reasonable?A teaching handout to hand out before this sheet: the rule, worked examples and common mistakes.- Pages
- 1
- Last updated
- Time
- About 15 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 Ms. Olivia Parker, Teacher and Mrs. Catherine Reynolds, 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.
