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Each game has 10 questions.

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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 3 - Number

Standard 3.N.9 - Solve subtraction equations involving tens with numbers up to 120

Included Skills:

Demonstrate an understanding of addition and subtraction of numbers with answers to 1000 (limited to 1-, 2- and 3-digit numerals), concretely, pictorially and symbolically, by:

• using personal strategies for adding and subtracting with and without the support of manipulatives.

• creating and solving problems in context that involve addition and subtraction of numbers.

• Model the addition of two or more given numbers, using concrete or visual representations, and record the process symbolically.

• Model the subtraction of two given numbers, using concrete or visual representations, and record the process symbolically.

• Create an addition or subtraction story problem for a given solution.

• Determine the sum of two given numbers, using a personal strategy; e.g., for 326 + 48, record 300 + 60 + 14.

• Determine the difference of two given numbers, using a personal strategy; e.g., for 127 – 38, record 38 + 2 + 80 + 7 or 127 – 20 – 10 – 8.

• Refine personal strategies to increase their efficiency.

• Solve a given problem involving the sum or difference of two given numbers.

• Solve a given problem using the standard/traditional addition algorithm.

• Solve a given problem using the standard/traditional subtraction algorithm.

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