Library›Multiplication Fluency›One card

A LITTLE SOMETHING WORTH KNOWING

A small discovery. Yours to pass on.

Math & LogicOne small ahaProduct

9 × 2

Think it. Then flip it. ahamoraTap to reveal Back to the cue
Math & LogicOne small aha
Your new aha18

9 groups of 2 make 18. Reversing the factors, 2 × 9, 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. 1359 × 3RECALL
    27

    Mental multiplication

    Open this card ↗
  2. 1369 × 4RECALL
    36

    Mental multiplication

    Open this card ↗
  3. 1379 × 5RECALL
    45

    Mental multiplication

    Open this card ↗