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1x1=1

11x11=121

111x111=12321

1111x1111=1234321

11111x11111=123454321

There is another 11 trick.

11

*11 ok so you always put the 11 on top. Then the number on the bottom. The first digit goes on the left. then leave a space for the middle number. Then the second digit and put it in the right spot. Then add those together and put that numbe rinto the middle spot!

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121

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14y ago

What else can I help you with?