Library›Multiplication Fluency›One card

A LITTLE SOMETHING WORTH KNOWING

A small discovery. Yours to pass on.

Math & LogicOne small ahaProduct

13 × 7

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

13 groups of 7 make 91. Reversing the factors, 7 × 13, 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. 21613 × 8RECALL
    104

    Mental multiplication

    Open this card ↗
  2. 21713 × 9RECALL
    117

    Mental multiplication

    Open this card ↗
  3. 21813 × 10RECALL
    130

    Mental multiplication

    Open this card ↗