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.

More Ways To Use Math Games
Game Quickplay
Video Help

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

Offline Worksheets

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

Top Mathematicians Leaderboards

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

Start a MathJam

Learn Math Together.

Math Games for Teachers

III - Numbers

Standard 3.N.1.2 - Practice estimating subtraction equations by first rounding the numbers then finding the difference.

Included Skills:

Addition and Subtraction
• Adds and subtracts numbers by writing them vertically in the following two cases:
- without regrouping.
- with regrouping.
• Uses the place value in standard algorithm of addition and subtraction.
• Solves addition and subtraction problems in different situations presented through pictures and stories.
• Frames problems for addition and subtraction facts.
• Estimates the sum of, and difference between, two given numbers.

If you notice any problems, please let us know.