Vedic Mathematics
Meet the 16 sutras and see how Vedic methods turn long calculations into smaller, repeatable steps.
Learn Vedic MathematicsFree guides and practice
Free Mental Math Tutorials
Pick a method, study a worked example, and practise at your own pace. NumDojo covers Vedic Mathematics, the Trachtenberg System, and Soroban.
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Choose a Method
Each route starts with the basic idea before moving into guided lessons and practice.
Trachtenberg System
Learn the neighbour-based rules for fast multiplication, including the popular multiply-by-11 method.
Learn the Trachtenberg SystemSoroban and Anzan
Learn bead values and complements, then move from a physical Japanese abacus towards mental calculation.
Learn SorobanWorked guides
Learn One Technique at a Time
What Is Vedic Mathematics?
A beginner-friendly introduction to the sutras, with worked examples and advice on where to start.
Trachtenberg Rules and Examples
Work through multiplication rules for 11, 12, 5, and 6, then check the mistakes learners often make.
How the Soroban Builds Mental Calculation
See how bead movement becomes mental visualisation and how to practise without racing too early.
Practise What You Learn
Use a virtual abacus, work through a worksheet, compare methods, or build a short practice routine.
Free Virtual Soroban
Move the beads online, set target numbers, and keep a practice streak in your browser.
Open the virtual SorobanPrintable Trachtenberg ×11 Worksheet
Try 12 questions, check each answer online, print a fresh sheet, or download the PDF answer key.
Open the free worksheetCompare the Three Methods
Compare Vedic Mathematics, Trachtenberg, and Soroban by strengths, learning style, and typical use.
Compare the methodsFive Ways to Practise Mental Math
Build a useful practice routine with short sessions, recall, estimation, and timed work used carefully.
Read the practice guideGuides for Adults Supporting Learners
For parents
Help a child practise mental math at home without turning every session into a speed test.
Read the parent's guideFor teachers
Use short speed-math activities, assignments, and progress checks in a classroom routine.
Read the teacher's guideReady for Guided Practice?
Create a free account to save progress, practise up to 20 problems a day, and work through 42 foundation lessons across all eight learning paths.
Start 42 Free LessonsNo card required.