Free online math practice
Mental subtraction within 100 Practice
Subtract within 100: whole tens, no regrouping, and crossing one ten with a single digit.
Start practicingMental subtraction within 100
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- Progress stays on this device.
What you’ll practice
Cross a ten in two manageable steps or subtract whole tens directly. Check your result by adding the amount back.
Where this helps
Subtracting familiar numbers mentally.
Before you start
Use this topic to practice math you have already learned. The examples show the available kinds of recall tasks; this is not a complete textbook chapter. Check the answer form and any stated conditions.
Try a few examples
Real practice. Real progress.
Example 1 of 4
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Start practicingMental subtraction within 100
- Free to practice.
- No account required.
- Progress stays on this device.