LibrarySubtraction FluencyOne card

A LITTLE SOMETHING WORTH KNOWING

A small discovery. Yours to pass on.

Math & LogicOne small ahaDifference

9 − 1

Think it. Then flip it.
ahamoraTap to reveal
Back to the cue
Math & LogicOne small aha
Your new aha8

9 − 1 = 8. The difference tells you the gap between 1 and 9. 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. 559 − 0RECALL
    9

    Mental subtraction

    Open this card ↗
  2. 5610 − 10RECALL
    0

    Mental subtraction

    Open this card ↗
  3. 5710 − 9RECALL
    1

    Mental subtraction

    Open this card ↗