ACARA AC9M3A02, Mental strategies from facts to 20
Year 3 · Algebra
Extend addition and subtraction facts to twenty into efficient mental strategies for larger numbers, without a calculator.
Below are free printable maths worksheets that support AC9M3A02. Print them as PDFs, or generate a fresh one. Every maths answer key is computed in code, so it is never wrong.
Teaching guide
Extend addition and subtraction facts to twenty into efficient mental strategies for larger numbers, without a calculator.
Start by counting on from the larger number, then move to partitioning into tens and ones and adding each part, and finally column addition with regrouping.
Generated and checked in code, so it is correct.
Adding the tens and ones columns without carrying the regrouped ten, and always counting on from the first number rather than the larger.
Addition worksheets
All addition worksheets →Sets A-F are the same worksheet with different questions - print any (or all) for fresh practice.
Subtraction worksheets
All subtraction worksheets →Sets A-F are the same worksheet with different questions - print any (or all) for fresh practice.
Australian Curriculum content descriptions (c) ACARA, used under CC BY 4.0. Descriptions are paraphrased. See australiancurriculum.edu.au.