Addition and Subtraction strategies

This term we have been learning about addition and subtraction strategies.

In addition, some strategies we have been practising are:

  • Bridge to ten – where you add to the closest ten
  • Using the algorithm where you add the ones first and you might need to rename.
  • Splitting a number into an easier number to add. For example splitting a number into tens and ones then adding them together.
  • Using the number line to add easier numbers.
  • Counting on by ones
  • Skip counting by 2s, 3s, 4s and so on.

In subtraction, some strategies we have been practising are:

  • Algorithm where you take away the ones first and then you may need to rename.
  • Counting backwards by a counting pattern
  • Adding on from a smaller number
  • Using estimation to check our answers
  • Taking away the ones and then tens

What other strategies do you know? What else do you know about addition and subtraction? How might you use this in real life?