AC9M3A02
“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
Skills on the Learning Map matched to this code — candidate alignments, machine-suggested and unreviewed (v0.1).
high confidence6 skills
medium confidence26 skills
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