ACARA AC9M4N09, Inverse operations
Year 4 · Number
Recognise and explain how addition and subtraction undo each other and use this to find unknown values.
Below are free printable maths worksheets that support AC9M4N09. Print them as PDFs, or generate a fresh one. Every maths answer key is computed in code, so it is never wrong.
Teaching guide
Recognise and explain how addition and subtraction undo each other and use this to find unknown values.
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 →Addition worksheets
All addition worksheets →Subtraction worksheets
All subtraction worksheets →Australian Curriculum content descriptions (c) ACARA, used under CC BY 4.0. Descriptions are paraphrased. See australiancurriculum.edu.au.