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ACARA AC9M4N06, Estimate to check answers

Year 4 ยท Number

Estimate quantities and use estimation when solving problems to decide whether calculations are reasonable.

Below are free printable maths worksheets that support AC9M4N06. Print them as PDFs, or generate a fresh one. Every maths answer key is computed in code, so it is never wrong.

Teaching guide

What students learn

Estimate quantities and use estimation when solving problems to decide whether calculations are reasonable.

How to teach it

Use a number line to see which ten/hundred a number is closest to. Underline the rounding digit and check the digit to its right.

Worked example
Round 14 to the nearest 10:
Answer: 10

Generated and checked in code, so it is correct.

Watch out for

Rounding to the wrong place, and the exact-halfway case (5 rounds up) being applied inconsistently.

Make a worksheet for AC9M4N06
More Year 4 Number codes: AC9M4N01 ยท AC9M4N02 ยท AC9M4N03 ยท AC9M4N04 ยท AC9M4N05 ยท AC9M4N07 ยท AC9M4N08 ยท AC9M4N09
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Australian Curriculum content descriptions (c) ACARA, used under CC BY 4.0. Descriptions are paraphrased. See australiancurriculum.edu.au.