Round and adjust
Move a small amount between numbers to create an easier sum.
Mixed adaptive practice
Free Arithmetic Game
Build everyday calculation fluency with a balanced mix that adapts as your answers become faster and more accurate.
- Free and no signup
- Clear one-point scoring
- Keyboard and mobile keypad
Mixed arithmetic · 60 seconds
Free Arithmetic Game
60 seconds. Find your pace.
18 + 7 = ?
No signup · Sound off · Keyboard ready
How this game works
Focused practice, useful feedback
Adaptive arithmetic practice begins at Tier 2 and reviews each block of five answers. Strong, quick blocks move up one tier; unusually difficult blocks can move down.
Every division question has a whole-number answer, subtraction stays non-negative, and repeated or immediate inverse questions are avoided.
Calculate with less friction
Work from known facts
Break a product into familiar parts.
Check the operation
Multiply the quotient and divisor to verify your answer.
Useful answers
How does adaptive difficulty work?
Accuracy and median response time over five answers determine whether the next tier changes.
Are there negative numbers?
No. Version 1 uses non-negative integer answers only.