Library›Subtraction Fluency›One card

A LITTLE SOMETHING WORTH KNOWING

A small discovery. Yours to pass on.

Math & LogicOne small ahaDifference

19 − 0

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

19 − 0 = 19. The difference tells you the gap between 0 and 19. 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. 21120 − 20RECALL
    0

    Mental subtraction

    Open this card ↗
  2. 21220 − 19RECALL
    1

    Mental subtraction

    Open this card ↗
  3. 21320 − 18RECALL
    2

    Mental subtraction

    Open this card ↗