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SubscribeUnlock 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.
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 and Operations in Base Ten
Standard 1.NBT.3.5 - Understand the place values of tens. Add 10 more or less to a number.
Included Skills:
Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.
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