Subtraction

  • Most used method is decomposition (taking one from the tens column and adding ten to the units column)
    • Use 10p and 1p to explain this – you can exchange 10p for ten 1ps.
    • Or use 10s and 1s Dienes blocks or Cuisenaire rods.
  • We need to be careful with our language – we say you can’t take 7 away from 2, but we’re lying.

One thought on “Subtraction

  1. Pingback: Summer Institute highlight: An amazing day on number | Weekly Maths

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