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11's Multiplication tricks

There are two rules when multiplying by 11 (eleven).**The first 11 Times Rule:**

This is for the numbers 1-9When multiplying any single digit number by 11 you just write that number twice.Multiply 11 by 3 to get 33, multiply 11 by 4 to get 44. Each number to 10 is just duplicated.**The second 11 Times Rule:****This is for any two digit number**You are going to take the two digits of your number add them together, and put the sum in between the two digits you started with. For example: if you take 11 x 18. Jot down 1 and 8 with a space between it. 1 8.The sum of 1+8=9, do put the 9 in between the 1 and 8.so you get 198.

12 x 11 1 2 1+2=3 132 12 x 11=13215 x 11 1 5 1+5=6 165 15 x 11=16511's

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