Library›Subtraction Fluency›One card

A LITTLE SOMETHING WORTH KNOWING

A small discovery. Yours to pass on.

Math & LogicOne small ahaDifference

23 − 23

Think it. Then flip it. ahamoraTap to reveal Back to the cue
Math & LogicOne small aha
Your new aha0

23 − 23 = 0. The difference tells you the gap between 23 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. 27823 − 22RECALL
    1

    Mental subtraction

    Open this card ↗
  2. 27923 − 21RECALL
    2

    Mental subtraction

    Open this card ↗
  3. 28023 − 20RECALL
    3

    Mental subtraction

    Open this card ↗