Library›Subtraction Fluency›One card

A LITTLE SOMETHING WORTH KNOWING

A small discovery. Yours to pass on.

Math & LogicOne small ahaDifference

23 − 4

Think it. Then flip it. ahamoraTap to reveal Back to the cue
Math & LogicOne small aha
Your new aha19

23 − 4 = 19. The difference tells you the gap between 4 and 23. Source: Subtraction ↗

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 Subtraction Fluency

A few more worth knowing.

  1. 29723 − 3RECALL
    20

    Mental subtraction

    Open this card ↗
  2. 29823 − 2RECALL
    21

    Mental subtraction

    Open this card ↗
  3. 29923 − 1RECALL
    22

    Mental subtraction

    Open this card ↗