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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.
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 - Number
Standard 1.N.10 - Practice solving subtraction sentences from 1 to 18.
Included Skills:
Describe and use mental mathematics strategies (memorization not intended), such as: counting on and counting back, making 10, doubles, using addition to subtract to determine basic addition facts to 18 and related subtraction facts.
• Use and describe a personal strategy for determining a sum.
• Use and describe a personal strategy for determining a difference.
• Write the related subtraction fact for a given addition fact.
• Write the related addition fact for a given subtraction fact.
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