3-CARD SLAP
mixed operations · adding and subtracting within 20 using mental strategies
To add and subtract within 20 using mental strategies
3-CARD SLAP is a Grade 2 mental math game that mixes addition and subtraction within 20. Three cards create the numbers for each round: students combine two values, subtract the third, and watch for target results such as 5, 10, or 15. The need to calculate mentally before reacting keeps attention on number relationships and efficient strategies.
Use it in a small group when students are ready for quick computation and can benefit from hearing how classmates reached the same result. The target numbers give you natural openings to discuss doubles, making ten, and other mental strategies. Generate teacher-ready lesson support for 3-CARD SLAP with a free account. No credit card required; 3 lesson generations for life.
- Grades:
- 2
- Players:
- 3 players
- Materials:
- cards
- Classroom use:
- small group
Standards alignment
Official Rules
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