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Instructional Videos, • 4/22/25 How to Do Rapid Mental Multiplications using Cross-Multiplication (with Mental Calculator Sam Engel) Previous Alternative Strategies for Rapid Mental Multiplications (with Mental Calculator Sam Engel) Next How to Do Rapid Mental Multiplications the Traditional Way (with Mental Calculator Sam Engel) You Might Also Like Calculation League Season 2 Finals --- Kaloyan vs. Rahul (narrated by Sam Engel) Calculation League Season 3, Playoff Week 5 Match Traditional vs. Cross Multiplication (with Mental Calculator Sam Engel) Mental Calculation League Season 1, Week 4 --- It's a Tie Mental Calculation League Season 1, Playoff Match #5 (Regulation)
