Library›Multiplication Fluency›One card

A LITTLE SOMETHING WORTH KNOWING

A small discovery. Yours to pass on.

Math & LogicOne small ahaProduct

7 × 13

Think it. Then flip it. ahamoraTap to reveal Back to the cue
Math & LogicOne small aha
Your new aha91

7 groups of 13 make 91. Reversing the factors, 13 × 7, 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. 1087 × 14RECALL
    98

    Mental multiplication

    Open this card ↗
  2. 1097 × 15RECALL
    105

    Mental multiplication

    Open this card ↗
  3. 1107 × 16RECALL
    112

    Mental multiplication

    Open this card ↗