Tag Archives: Multiplication

Is Dear Aunt Sally “Batty”?

The phrase Please Excuse My Dear Aunt Sally may be cute, but it is also quite misleading. It leads students to think that they always need to do multiplication before division, which is wrong. You do whichever operation comes first as you read the expression from left to right

Multiplication Trick #5 — Multiply Two-Digit Numbers by 11

There’s a quick and easy trick for multiplying two-digit numbers by 11. Dazzle your friends, amaze your family, begin your career in show-biz … o.k., maybe not show-biz, but still this is a pretty cool trick. Check it out!

Multiplication Trick #2 — Multiply by 15 FAST!

Here’s a great trick that helps you quickly multiply by 15. It’s handy for many real life situations, such as when you need to calculate a 15% tip at a restaurant. It involves nothing more than simple math. Try it, and then watch as your friends and family gaze in amazement.