The soroban (Japanese abacus) is a time-honored tool for teaching mental math. It helps the learner visualize numbers and operations, boosting speed, accuracy and focus.
What will you learn?
- Soroban basics: the structure of the abacus and how to represent numbers.
- Addition: direct, the five-complement and the ten-complement.
- Subtraction: direct, the five-complement and borrowing.
- Multiplication: using partial products and the times table.
- Division: place-by-place division using repeated subtraction.
How to benefit?
- Start with the Soroban basics lesson.
- Practice each operation with the interactive examples.
- Go to Test Yourself to measure your progress.