Why is negative times negative positive? PART I (James Tanton)
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Oh, I meant to add that if an explanation is needed, your approach is remarkably good. I'll have to remember it.
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My approach to this (after "negative times positive is negative" is understood) would be to simply ask students, "What should happen when you multiply a negative number by a negative number?"
It worked beautifully with my unschooled 7-year-old, anyway. After a moment, she not only knew the "correct" answer, she had come up with a good justification.
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Thanks Dr !
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Very helpful, thanks.
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curvaceousss 1 year ago
@curvaceousss Thanks! - J
DrJamesTanton 1 year ago