Judge Me!: One Hidden Ones Digit
addition · estimating and adding two-digit numbers
To add two 2-digit numbers
Judge Me!: One Hidden Ones Digit is a Grade 2 addition-estimation game built from two-digit numbers. The teacher reveals both tens digits and one ones digit while keeping the other ones digit hidden, and students estimate the sum before the final card is shown. Once the hidden digit is revealed, players calculate the exact total and compare their estimate with the actual answer.
Use it in a small group when students are learning to estimate sums by using place value rather than guessing randomly. The partially hidden number gives students enough information to make a reasoned prediction while leaving real uncertainty in the ones place. Create a free Find a Math Game account to generate lesson support for Judge Me!: One Hidden Ones Digit. No credit card, with 3 lifetime lesson generations.
- Grades:
- 2
- Players:
- 2–4 players
- Materials:
- cards, printable
- Classroom use:
- small group
Standards alignment
Official Rules
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Original Printable
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