• When you add 0 to a number, the number stays the same.
  • 4+0=4
  • When you subtract 0 from a number, the number stays the same.
  • 10–0=10
  • You can count back to find 10–6. Start at 10 and count back 6 times.
  • You end at 4.
  • 10–6=4