ACARA AC9M3A01, Addition and subtraction as inverses
Year 3 · Algebra
Explain how addition and subtraction undo each other, and use this to partition numbers and find unknown values in number sentences.
Below are free printable maths worksheets that support AC9M3A01. Print them as PDFs, or generate a fresh one. Every maths answer key is computed in code, so it is never wrong.
Teaching guide
Explain how addition and subtraction undo each other, and use this to partition numbers and find unknown values in number sentences.
Show that three numbers make four related facts (two + and two -, or two × and two ÷) using a part-part-whole diagram or a triangle card.
Generated and checked in code, so it is correct.
Not seeing subtraction/division as the inverse, so children re-count instead of using the known addition/multiplication fact.
Fact Families worksheets
All fact families worksheets →Sets A-F are the same worksheet with different questions - print any (or all) for fresh practice.
Number Bonds worksheets
All number bonds worksheets →Sets A-F are the same worksheet with different questions - print any (or all) for fresh practice.
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.