Add and subtract numbers up to 20

Learn with an example

  • You can count back to subtract. Start from 14 and count back 5:
  • 14, 13, 12, 11, 10, 9
  • 14 – 5=9
  • The difference is 9.
  • You can count up to add. It is easier to start with a larger number. Start from 12 and count up to 7:
  • 12, 13, 14, 15, 16, 17, 18, 19
  • 12 + 7=19
  • The sum is 19.
  • You can count up to add. Start from 1 and count up to 1:
  • 1, 2
  • 1+1= 2
  • The sum is 2.