AC9M3N03 • Year 3 Maths

Add and Subtract with Place Value (AC9M3N03)

add and subtract two- and three-digit numbers using place value to partition, rearrange and regroup numbers to assist in calculations without a calculator

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

Unit focus

  • Place value lets us split numbers into hundreds, tens and ones, regroup equal values and choose efficient addition or subtraction strategies.
  • Use this routine: Estimate → Partition → Regroup → Calculate → Check with inverse.
  • Watch for regrouping without equal exchange: Trade 10 ones for 1 ten or 10 tens for 1 hundred.
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