LibraryMultiplication FluencyOne card

A LITTLE SOMETHING WORTH KNOWING

A small discovery. Yours to pass on.

Math & LogicOne small ahaProduct

15 × 11

Think it. Then flip it.
ahamoraTap to reveal
Back to the cue
Math & LogicOne small aha
Your new aha165

15 groups of 11 make 165. Reversing the factors, 11 × 15, gives the same product. Source: Multiplication table

ahamoraReference ↗

Keep the thread going

One answer is a beginning.

Share a little curiosity, or follow it into the full collection.

Flip the full deck →

More from Multiplication Fluency

A few more worth knowing.

  1. 25815 × 12RECALL
    180

    Mental multiplication

    Open this card ↗
  2. 25915 × 13RECALL
    195

    Mental multiplication

    Open this card ↗
  3. 26015 × 14RECALL
    210

    Mental multiplication

    Open this card ↗