LibraryAddition FluencyOne card

A LITTLE SOMETHING WORTH KNOWING

A small discovery. Yours to pass on.

Math & LogicOne small ahaSum

12 + 23

Think it. Then flip it.
ahamoraTap to reveal
Back to the cue
Math & LogicOne small aha
Your new aha35

12 + 23 = 35. Changing the order gives 23 + 12, 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. 32212 + 24RECALL
    36

    Mental addition

    Open this card ↗
  2. 32312 + 25RECALL
    37

    Mental addition

    Open this card ↗
  3. 32412 + 26RECALL
    38

    Mental addition

    Open this card ↗