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0:07:00

Trachtenberg Speed Math Addition

0:07:12

Trachtenberg Speed Math Fast Division with 2 Digit Divisors

0:10:07

Trachtenberg Speed Math - Two Finger Multiplication with 1or 2 digit multipliers

0:07:58

Trachtenberg Speed Math Squaring 2 Digit Numbers

0:06:53

Trachtenberg Speed Math - Direct Multiplication - 2 Digit Multipliers