Mental Arithmetic Identities (2022)

  1. Proving the Squaring Numbers Ending in 5 Trick
  2. Demonstrating a Trick for Squaring Numbers Ending in 6
  3. Generic Trick for Squaring All Numbers
  4. Second Generic Identity for Squaring All Numbers
  5. Trick for Squaring 40s (and 50s)
  6. Third Generic Trick for Squaring All Numbers
  7. Fourth Generic Trick for Squaring All Numbers
  8. Fifth Generic Trick for Squaring All Numbers