Fun Pattern squaring numbers whose digits are all ones

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Taught by YourMathGal
  • Currently 3.0/5 Stars.
4344 views | 7 ratings
Meets NCTM Standards:
Lesson Description:

A fun pattern for multiplying numbers by themselves (squaring) if all its digits are 11 x 11 or 11111 x 11111, etc. Show your friends!

More free YouTube videos by Julie Harland are organized at

Questions answered by this video:
  • What are some fun number patterns?
  • What is the pattern when all ones are squared?
  • What is 111^2, 11111^2, and 111111111^2?
  • Staff Review

    • Currently 3.0/5 Stars.
    This lesson is a cute little trick for squaring numbers that have only 1s in them. The pattern is pretty cool, and it works all the way up to 111111111^2.
  • alphasentaury

    • Currently 4.0/5 Stars.
    What about numbers with more than 9 1s in them?
  • rsand

    • Currently 4.0/5 Stars.
    I think she's fun! That's cool ^^