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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 Japanese Soroban Test (Engel) How to Do Rapid Mental Multiplications the Traditional Way (with Mental Calculator Sam Engel) Calculation League Season 3, Championship Match #1 (narrated by Jure Colak) Calculation League Season 3, Playoff Week 3 Match Calculation League Season 2 Playoffs: Rahul vs. Domenico
