3つ（またはそれ以上）の整数の掛け算の仕方 --- 計算機付き サミュエル・エンゲル
Summary for approaches to doing questions like AxBxC --- including a description of how to apply cross-multiplication to 3 integer multiplications.
00:00 Intro
03:45 Initial Multiplication
12:10 Second Multiplication
22:41 AxBxC Cross Multiplication
35:04 Demonstration
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Multioperation Mental Calculation Tutorial (with Herzegovinian Mental Calculator Jure Colak)
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