Description
How it works
Split the deck. Both players flip two cards at once and call out their sum. Each checks the other’s answer. If both are right, the greater sum wins the cards; if only one is right, that player wins regardless; if neither is right, the cards go to the bottom of both decks. Play until a deck runs out. Making accuracy beat magnitude is what stops children from guessing high and hoping.
What you’ll need
- One deck of numeral cards, or playing cards with kings and jacks removed (ace = 1, queen = 0)
Skills practiced
Addition within 20, comparing sums, and checking a partner’s reasoning — which turns out to be some of the best practice available.
Grade level
1st through 4th grade. Use only 0–5 to start, deal three cards each for three addends, or switch to subtraction or multiplication using the same rules.
Instant PDF download. Game instructions adapted from the ideas in Math Fact Fluency by Jennifer Bay-Williams and Gina Kling (ASCD / NCTM, 2019).
