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Each game has 10 questions.
Green box means correct.
Yellow box means incorrect.
Unlock harder levels by getting an average of 80% or higher.
Earn up to 5 stars for each level
The more questions you answer correctly, the more stars you'll unlock!
Each game has 10 questions.
Green box means correct.
Yellow box means incorrect.
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Grade 1 - The Number System
Standard 1.NS.1.10 - Complete the subtraction sentence by filling in the missing number with operands up to 18.
Included Skills:
Students will be expected to use and describe strategies to determine sums and differences using manipulatives and visual aids. Strategies include
• counting on or counting back
• one more or one less
• making ten
• doubles
• near doubles
• Performance Indicators
- N10.01 Use and describe a personal strategy to determine a sum.
- N10.02 Use and describe a personal strategy to determine a difference.
- N10.03 Use and describe how two different strategies can be used to determine a sum or difference.
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