Rounding and sensible estimates
Use nearby values to estimate and check whether an answer is reasonable.
Independent Pi Leo Academy learning material organised around the Victorian Curriculum F–10 Version 2.0 Level 4 descriptors; independent curriculum review is continuing. Year 4 is not an official NAPLAN testing year; NAPLAN is held in Years 3, 5, 7 and 9. It is not an official VCAA, ACARA, NAPLAN, government or IXL resource.
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What is 150 rounded to the nearest 10?
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Answer: 150
- The neighbouring multiples are 150 and 160.
- Choose the closer one; if exactly halfway, choose the greater one.
- The answer is 150.
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Curriculum reference
Victorian Curriculum F–10 Version 2.0
VC2M4N07
choose and use estimation and rounding to check and explain the reasonableness of calculations, including the results of financial transactions
These quizzes practise concepts within this topic. Multiple-choice answers alone do not demonstrate drawing, conducting an investigation or using a digital tool.
Activities to practise beyond the quiz
- Worked explanations teach reasonableness checks, but selecting an answer does not assess a learner's independently written or spoken explanation.
- VC2M4N07-C01Choose an appropriate estimation strategy.
- VC2M4N07-C02Use estimation to assess calculations.
- VC2M4N07-C03Choose an appropriate rounding strategy.
- VC2M4N07-C04Use rounding to assess calculations.
- VC2M4N07-C05Check whether calculation results are reasonable.
- VC2M4N07-C06Explain why calculation results are or are not reasonable.
- VC2M4N07-C07Apply reasonableness checks to financial transactions.
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Skills in this topic
Traceable coverage
Subskills
Supplied alignment skills
- 01Rounding
- 02Round decimals
- 03Round to the nearest five cents
- 04Round to the nearest five cents: word problems
- 05Round to the nearest dollar or more
- 06Round decimals to the nearest whole number
- 07Estimate sums
- 08Estimate sums: word problems
- 09Estimate differences
- 10Estimate differences: word problems
- 11Estimate products: multiply by one-digit numbers
- 12Estimate products: word problems
- 13Estimate products: multiply by two-digit numbers
- 14Estimate to compare quotients
- 15Estimate quotients: word problems
- 16Estimate sums, differences, products and quotients: word problems
- 17Multi-step word problems: identify reasonable answers