AC9M3A02
Parents start here
Your child is learning to add and subtract within 20 using clever steps.
- Solve 8 + 6 using making ten: 8 + 2 + 4 = 14
- Solve 13 − 4 by decomposing: 13 − 3 − 1 = 9
One skill from the map, ages 6–7 — its page has the rest of the checklist and what comes next. Candidate alignment, machine-suggested and unreviewed (v0.1).
“extend and apply knowledge of addition and subtraction facts to 20 to develop efficient mental strategies for computation with larger numbers without a calculator”
Official source: Australian Curriculum v9 — Mathematics ↗ · Content © ACARA, CC BY 4.0 · unofficial reference — verify at the official site
Other skills on the Learning Map matched to this code — candidate alignments, machine-suggested and unreviewed (v0.1).
high confidence5 skills
28 other candidate matches — 26 medium, 2 low
medium confidence
Addition and subtraction strategies (age 7+)
Early Word Problems
Missing number problems (age 7+)
Adding and subtracting (age 8+)
Fluent adding and subtracting within 1000
Fluent addition and subtraction (age 9+)
Addition and subtraction strategies
Mental addition and subtraction (age 6+)
Adding and subtracting (age 9+)
Inverse: addition undoes subtraction
Choosing the right strategy
Choosing representations strategically
Two-Step Equations
Two-Step Word Problems
Mental addition and subtraction (age 7+)
Unknown in Addition & Subtraction
Reasoning with Equivalences
Finding a missing number in addition
Adding within 100
Mentally adding tens to 3-digit numbers
Fluent adding and subtracting within 10
Addition and subtraction word problems
Mentally adding hundreds to 3-digit numbers
Adding and subtracting tens mentally
Multi-Step Problem Solving
Place value understanding and number facts
low confidence
Alignments generated 9 July 2026, unreviewed.
Nearby in the Algebra strand:
AC9M3A01AC9M3A03
Teaching this? Learning Map for teachers has the sequencing view and copy-paste words to send home.