Library›Addition Fluency›One card

A LITTLE SOMETHING WORTH KNOWING

A small discovery. Yours to pass on.

Math & LogicOne small ahaSum

17 + 17

Think it. Then flip it. ahamoraTap to reveal Back to the cue
Math & LogicOne small aha
Your new aha34

17 + 17 = 34. Changing the order gives 17 + 17, 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. 36517 + 18RECALL
    35

    Mental addition

    Open this card ↗
  2. 36617 + 19RECALL
    36

    Mental addition

    Open this card ↗
  3. 36717 + 20RECALL
    37

    Mental addition

    Open this card ↗