Use the keypad subtraction key without shifting the hand away from the number columns.

Make a controlled operator reach and immediately recover the tactile 5-key anchor.

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Subtraction Key Guided Entry: 20-7 84-25 150-48 600-175 1200-450 5000-1250

Subtraction Key Accuracy Review: 95-38 240-76 708-209 1500-625 4096-1088 8750-2750 12000-3450