Mental Math Techniques

Learn the same techniques used by mental math champions. Build speed and confidence with structured lessons and spaced-repetition practice.

Mental Addition

Add two- and three-digit numbers instantly using left-to-right addition, rounding and compensating, and decomposition strategies.

456 + 278 → 600 + 120 + 14 = 734

Multiply large numbers in your head with the distributive property, squaring shortcuts, and pattern recognition for 9s, 11s, and 25s.

25 × 48 → (25 × 4) × 12 = 1200

Ancient Indian techniques for lightning-fast calculation. The criss-cross method lets you multiply any two-digit numbers in seconds.

23 × 14 → 2|11|12 → 322

Go beyond rote memorization. Learn finger tricks for 9s, the insert-sum rule for 11s, and doubling strategies for 4s and 8s.

9 × 7 → hold finger 7 → 6 | 3 = 63

The foundation of mental arithmetic. Master bridging through 10 and near-doubles to add single-digit numbers instantly.

8 + 7 → 8 + 2 + 5 → 10 + 5 = 15

Velox teaches you step by step and reinforces each technique with spaced-repetition drills.