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Multiplication - Trick - 2

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11 x 9 = 99 9 + 9 = 18
12 x 9 = 108 10 + 8 = 18
13 x 9 = 117 11 + 7 = 18
14 x 9 = 126 12 + 6 = 18
15 x 9 = 135 13 + 5 = 18
16 x 9 = 144 14 + 4 = 18
17 x 9 = 153 15 + 3 = 18
18 x 9 = 162 16 + 2 = 18
19 x 9 = 171 17 + 1 = 18
20 x 9 = 180 18 + 0 = 18

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