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Multiplication x
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Why is Negative times Negative a Positive? What schools don't teach - YouTube
Thu 03 Apr 2025 10:51:56 PM CEST - permalink -Histoire d'éviter d'avoir l'air bête quand le neveu en 6ème pose la question.
- https://www.youtube.com/watch?v=j_TKQWpPZXQ