Library›Subtraction Fluency›One card

A LITTLE SOMETHING WORTH KNOWING

A small discovery. Yours to pass on.

Math & LogicOne small ahaDifference

28 − 11

Think it. Then flip it. ahamoraTap to reveal Back to the cue
Math & LogicOne small aha
Your new aha17

28 − 11 = 17. The difference tells you the gap between 11 and 28. 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. 42528 − 10RECALL
    18

    Mental subtraction

    Open this card ↗
  2. 42628 − 9RECALL
    19

    Mental subtraction

    Open this card ↗
  3. 42728 − 8RECALL
    20

    Mental subtraction

    Open this card ↗