Library›Subtraction Fluency›One card

A LITTLE SOMETHING WORTH KNOWING

A small discovery. Yours to pass on.

Math & LogicOne small ahaDifference

29 − 9

Think it. Then flip it. ahamoraTap to reveal Back to the cue
Math & LogicOne small aha
Your new aha20

29 − 9 = 20. The difference tells you the gap between 9 and 29. 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. 45729 − 8RECALL
    21

    Mental subtraction

    Open this card ↗
  2. 45829 − 7RECALL
    22

    Mental subtraction

    Open this card ↗
  3. 45929 − 6RECALL
    23

    Mental subtraction

    Open this card ↗