Get better at math and mental arithmetic
Get better at mental math with fun questions. Five minutes a day makes a big difference.
- Free
- No ads
- No sign-up to play
- Play offline
Skills
Get better at math and mental arithmetic
Get better at mental math with fun questions. Five minutes a day makes a big difference.
About SumNinja
Practice mental math with quick calculation questions. Build speed, improve accuracy, track progress, and play alone or with friends.
How to play
Choose how you want to play, answer the math questions, and try to beat your own best score. SumNinja saves progress for each player.
- Look at the question in the middle of the screen.
- Type the answer and press Enter. In Speed, each question has its own timer. In Accuracy, the first wrong digit ends the round.
- After each round, SumNinja updates your stats and chooses questions that fit your level.