Notice the following pattern for multiplication by 11: 14 X 11 =1_4 51 X 11 = 5_1
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Notice the following pattern for multiplication by 11:
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14 X 11 =1_4 51 X 11 = 5_1 First, copy the first and last digits of the number to be multiplied by 11. Leave a space between these digits. Then, insert the sum of the original two digits between those original digits: 14 X 11 = 154 51 X 11 = 561
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