For Joshy: Top Ten+ Arithme”tricks”

Filed in PersonalTags: Education, Family, Geekery

For Joshy (and the rest of us, too): I'm sure you're working on your math tables, memorizing addition, subtraction, multiplication, and division of numbers from one through ten.

Do you need a shortcut for multiplying by four, five, nine, or eleven, or squaring two-digit numbers ending in five? How about subtracting a large number from 1,000? Well then, see this list of arithme[em]tricks[/em].

(H/T: Lifehacker)


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One Response to “For Joshy: Top Ten+ Arithme”tricks””
  1. Mel says:

    Chip, Josh really likes the first tip. We are going to slowly work through the list of other tips so he doesn’t become overwhelmed! This is a pretty cool list!