Library›Multiplication Fluency›One card

A LITTLE SOMETHING WORTH KNOWING

A small discovery. Yours to pass on.

Math & LogicOne small ahaProduct

11 × 15

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

11 groups of 15 make 165. Reversing the factors, 15 × 11, 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. 18611 × 16RECALL
    176

    Mental multiplication

    Open this card ↗
  2. 18711 × 17RECALL
    187

    Mental multiplication

    Open this card ↗
  3. 18811 × 18RECALL
    198

    Mental multiplication

    Open this card ↗