Library›Multiplication Fluency›One card

A LITTLE SOMETHING WORTH KNOWING

A small discovery. Yours to pass on.

Math & LogicOne small ahaProduct

10 × 13

Think it. Then flip it. ahamoraTap to reveal Back to the cue
Math & LogicOne small aha
Your new aha130

10 groups of 13 make 130. Reversing the factors, 13 × 10, 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. 16510 × 14RECALL
    140

    Mental multiplication

    Open this card ↗
  2. 16610 × 15RECALL
    150

    Mental multiplication

    Open this card ↗
  3. 16710 × 16RECALL
    160

    Mental multiplication

    Open this card ↗