Library›Addition Fluency›One card

A LITTLE SOMETHING WORTH KNOWING

A small discovery. Yours to pass on.

Math & LogicOne small ahaSum

0 + 11

Think it. Then flip it. ahamoraTap to reveal Back to the cue
Math & LogicOne small aha
Your new aha11

0 + 11 = 11. Changing the order gives 11 + 0, 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. 330 + 12RECALL
    12

    Mental addition

    Open this card ↗
  2. 340 + 13RECALL
    13

    Mental addition

    Open this card ↗
  3. 350 + 14RECALL
    14

    Mental addition

    Open this card ↗