AC9M4A01 • Year 4 Maths

Unknown Values in Addition and Subtraction Equations (AC9M4A01)

find unknown values in numerical equations involving addition and subtraction, using the properties of numbers and operations

Choose a learning activity. Practice and Test use short shuffled attempts. Repeat quiz practice to access more of the full question bank.

Unit focus

  • An equation states that two expressions have the same value. Solving means finding a value that preserves equality, not moving symbols by a memorised trick.
  • Use this routine: Read both sides → Identify unknown role → Preserve equality → Use inverse/property → Substitute and check.
  • Watch for equals sign means 'answer comes next': It means both sides have equal value.
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