Library›Addition Fluency›One card

A LITTLE SOMETHING WORTH KNOWING

A small discovery. Yours to pass on.

Math & LogicOne small ahaSum

6 + 7

Think it. Then flip it. ahamoraTap to reveal Back to the cue
Math & LogicOne small aha
Your new aha13

6 + 7 = 13. Changing the order gives 7 + 6, 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. 936 + 8RECALL
    14

    Mental addition

    Open this card ↗
  2. 946 + 9RECALL
    15

    Mental addition

    Open this card ↗
  3. 956 + 10RECALL
    16

    Mental addition

    Open this card ↗