Remove ads and gain access to the arcade and premium games!

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.

Need some help or instruction on how to do this skill?

Want a paper copy? Print a generated PDF for this skill.

Share MathGames with your students, and track their progress.

See how you scored compared to other students from around the world.

Learn Math Together.

Grade 2 - The Number System

Standard 2.NS.1.9 - Complete the subtraction sentence by filling in the missing number with operands up to 18.

Included Skills:

Students will be expected to demonstrate an understanding of addition (limited to 1 and 2-digit numerals) with answers to 100 and the corresponding subtraction by

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

• creating and solving problems that involve addition and subtraction

• explaining and demonstrating that the order in which numbers are added does not affect the sum

• explaining and demonstrating that the order in which numbers are subtracted matters when finding a difference

• Performance Indicators

- N09.01 Solve a given story problem of any type by modelling it with materials or a diagram, and write a number sentence that represents the thinking in the solution.

- N09.02 Solve a given story problem of any type by writing a number expression and combining the numbers to complete the number sentences.

- N09.03 Match a number sentence to a given story problem.

- N09.04 Create an addition or a subtraction number sentence and a story problem for a given solution.

- N09.05 Model addition and subtraction using concrete materials or visual representations and record the process symbolically.

- N09.06 Add a given set of numbers in two different ways and explain why the sum is the same.

- N09.07 Recognize and create equivalent addition and subtraction number sentences.

If you notice any problems, please let us know.