Train your brain with world-class abacus techniques and lightning-fast calculation tools.
Progress step by step, from Level 0 to Level 8
Meet the abacus. Learn its parts, finger movements and bead identification, then practise direct single-digit addition and subtraction (1–9).
Single-digit addition and subtraction using the 5's and 10's complement formulas, with mental-visualization practice.
Addition and subtraction with 5's, 10's and mixed complements, including negative results and borrowing.
Addition and subtraction of single, double and triple-digit numbers with full formula mastery and dictation drills.
4-digit addition/subtraction plus the start of multiplication (1D×1D, 2D×1D, 3D×1D). Times tables build the base.
Larger multiplication (2D×2D, 3D×2D, long multiplication) with mental visualization beginning in earnest.
Introduction to division (2D÷1D up to 4D÷1D and beyond) with speed drills and timed mental practice.
Decimal addition, subtraction, multiplication and division, plus advanced multi-digit division, done mentally.