Faster Than Calculators? The abacus hand method is a mental math technique where practitioners use finger movements to simulate an abacus in their minds. Though it might look like random gestures, each motion represents a specific value, allowing for lightning-fast mental calculations. This method originates from traditional abacus training, especially in countries like Japan, China, and India, where students learn to visualize bead movements without needing a physical tool. Studies have shown t