A platform that teaches you addition, subtraction, multiplication and division on the Japanese abacus, step by step, with an interactive abacus and quizzes that track your progress.
Choose the operation you want to learn
The Japanese abacus and how to represent numbers
Open lesson →Addition on the soroban: direct, five-complement and ten-complement
Open lesson →Subtraction on the soroban: direct, five-complement and borrowing
Open lesson →Multiplication on the soroban using partial products
Open lesson →Division on the soroban, place by place
Open lesson →Practice doing arithmetic mentally with speed and accuracy.
Builds concentration and the ability to visualize numbers.
An interactive abacus and instant drills with graded levels.
Quizzes that save your results and best scores automatically.
Guides and tips on learning the soroban and mental math
Learn about the soroban (the Japanese abacus): its history, its parts, and how it is used to teach fast mental math to children and adults.
Read article → (5 min read)Discover the benefits of learning the soroban for kids: focus, memory, mental calculation speed and self-confidence, and the best age to start.
Read article → (6 min read)What is anzan? Learn how the soroban becomes a mental image that lets you calculate quickly without an abacus, and how to train it.
Read article → (4 min read)A practical beginner’s guide to learning the soroban from scratch: representing numbers, addition, subtraction, multiplication and division, with tips for effective practice.
Read article → (7 min read)A comparison of the Japanese soroban, the Chinese suanpan and the abacus: number of beads, calculation method, and which is best for learning.
Read article → (5 min read)Practical steps to teach your child the soroban at home with no prior experience: setup, a daily practice schedule, and how to make learning fun.
Read article → (6 min read)Start a quick quiz and discover your level in the four operations.
Start the quiz now