AC9M4N07Year 4NumberPractised on site

AC9M4N07 — Year 4 Number

Official Curriculum Content Description:

choose and use estimation and rounding to check and explain the reasonableness of calculations including the results of financial transactions

Worked Examples (1)

Example 1Estimation & Rounding Calculations

Estimate the sum of

23 + 12

by first rounding each number to the nearest

10

Common mistake: Calculating exact value without rounding or rounding in wrong direction

Correct Answer:

30

Worked Solution:

Round each addend to the nearest

10

: -

23 \approx 20

12 \approx 10

Add the rounded values:

20 + 10 = 30

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