ACARA AC9M1A02, Addition facts to 20
Year 1 · Algebra
Build fluency with addition facts to twenty and use them to work out the matching subtraction facts.
Below are free printable maths worksheets that support AC9M1A02. Print them as PDFs, or generate a fresh one. Every maths answer key is computed in code, so it is never wrong.
Teaching guide
Build fluency with addition facts to twenty and use them to work out the matching subtraction facts.
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 →Subtraction worksheets
All subtraction worksheets →Fact Families worksheets
All fact families worksheets →Australian Curriculum content descriptions (c) ACARA, used under CC BY 4.0. Descriptions are paraphrased. See australiancurriculum.edu.au.