LibraryAddition FluencyOne card

A LITTLE SOMETHING WORTH KNOWING

A small discovery. Yours to pass on.

Math & LogicOne small ahaSum

22 + 27

Think it. Then flip it.
ahamoraTap to reveal
Back to the cue
Math & LogicOne small aha
Your new aha49

22 + 27 = 49. Changing the order gives 27 + 22, the same sum. Source: Addition

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 Addition Fluency

A few more worth knowing.

  1. 45523 + 23RECALL
    46

    Mental addition

    Open this card ↗
  2. 45623 + 24RECALL
    47

    Mental addition

    Open this card ↗
  3. 45723 + 25RECALL
    48

    Mental addition

    Open this card ↗