Maths
Column Subtraction with Exchange (3-digit)
Subtract numbers with up to three digits using the formal column method with exchange.
MathsAge 9+25 minutes
What this topic covers
- Set out a subtraction in columns and subtract ones, then tens, then hundreds.
- Exchange a ten for ten ones, and a hundred for ten tens, when a column cannot be subtracted.
- Record the exchange clearly and avoid subtracting the wrong way round.
Core concept summaries
Key ConceptsColumns, Ones FirstOpen a Tube or a CrateNever Swap, Always Exchange
Practice formats pupils may meet
NeurofiED uses varied practice to help pupils apply the idea actively, check understanding and build confidence over time.
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