If multiplication is just repeated addition, then why when 2 negatives get multiplied they become a positive?
In: Mathematics
When you add a number more times, the result gets bigger. When you add a number fewer times, it becomes smaller. When you add a number a negative number of times, it crosses past 0 onto the other side of the number line. So, (counting down from 2 by -3 you get -6, -3, 0, +3, +6, …). Minus 2 groups of minus 3 balls is plus 6 balls.
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