What's 7 × (4 + 9)?
Needed more than five seconds? This can be better! With Mental Maths you can playfully improve your mental calculation skills through various exercises. Image puzzles are an incentive to carry on practicing.

Choose math exercises from many categories:
- Basic Arithmetic
- Division with Remainder
- Percentage Calculation
- Reading and Writing Roman Numerals
- Common Multiples and Divisors

Moreover, there are
- 4 Difficulty Levels
- an adjustable Time Limit
- Exercises in order of operations and parantheses
- Exercises to practice specific Multiplication Tables
- Statistics for multiple users

While the first difficulty level is designed for elementary school students, the higher levels are a challenge even for experienced calculators. Everyone reaches their limit when a time limit is set, at the latest …


Mental Maths has been developed by a mathematician from the University of Hamburg in collaboration with mathematics teachers in grades 1-10.