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.

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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Math Games for Teachers

Grade 3 - Number

Standard 3.N.10 - Complete the table with numbers up to 20 by applying the addition rule to the left column to get the result in the right column.

Included Skills:

Apply mental mathematics strategies and number properties in order to understand and recall basic addition facts and related subtraction facts to 18.
Describe a mental mathematics strategy that could be used to determine a given basic fact, such as:
- doubles; e.g., for 6 + 8, think 7 + 7.
- doubles plus one; e.g., for 6 + 7, think 6 + 6 + 1.
- doubles take away one; e.g., for 6 + 7, think 7 + 7 – 1.
- doubles plus two; e.g., for 6 + 8, think 6 + 6 + 2.
- doubles take away two; e.g., for 6 + 8, think 8 + 8 – 2.
- making 10; e.g., for 6 + 8, think 6 + 4 + 4 or 8 + 2 + 4.
- commutative property; e.g., for 3 + 9, think 9 + 3.
- addition for subtraction; e.g., for 13 – 7, think 7 + ? = 13.
Apply the property of zero to determine a given sum or difference when adding or subtracting zero; e.g., 5 + 0 = 5 and 5 – 0 = 5.
Provide a rule for determining answers when adding and subtracting zero.
Apply a mental mathematics strategy to provide a solution to a given basic addition fact up to and including 9 + 9 or a related subtraction fact.
Demonstrate understanding, recall/memorization and application of addition facts up to and including 9 + 9 and related subtraction facts.

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