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15 x 13 = 195

A simpler way of breaking this down is:

15 x 13 =
(10 + 5) x (10 + 3) =
(10 x 10) + (10 x 3) + (10 x 5) + (5 x 3) =
100 + 30 + 50 + 15 = 195

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15y ago

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