HIDDEN SLAP IT CHALLENGE ADDITION
addition · adding a one-digit number to a two-digit number and comparing numbers
To add two-digit number and one-digit number, to compare numbers up to 100
HIDDEN SLAP IT CHALLENGE ADDITION is a Grade 2 partner game that combines addition with number comparison. Students first build a shared two-digit number, then each secretly adds a one-digit card to that number. One player must decide whether their hidden result is higher or lower than the opponent’s before both cards are revealed, so computation and comparison happen together.
Use it when students are practicing two-digit plus one-digit addition and need to think beyond finding the sum. The hidden information gives them a reason to state and defend a comparison claim before seeing the other result. Create a free Find a Math Game account to generate the lesson for HIDDEN SLAP IT CHALLENGE ADDITION. No credit card, with 3 lesson generations for life.
- Grades:
- 2
- Players:
- 2 players
- Materials:
- cards
- Classroom use:
- partner work
Standards alignment
Official Rules
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