Library›Multiplication Fluency›One card

A LITTLE SOMETHING WORTH KNOWING

A small discovery. Yours to pass on.

Math & LogicOne small ahaProduct

17 × 9

Think it. Then flip it. ahamoraTap to reveal Back to the cue
Math & LogicOne small aha
Your new aha153

17 groups of 9 make 153. Reversing the factors, 9 × 17, 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. 29417 × 10RECALL
    170

    Mental multiplication

    Open this card ↗
  2. 29517 × 11RECALL
    187

    Mental multiplication

    Open this card ↗
  3. 29617 × 12RECALL
    204

    Mental multiplication

    Open this card ↗