2x
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1 x 2 =
2 x 2 =
3 x 2 =
4 x 2 =
5 x 2 =
6 x 2 =
7 x 2 =
8 x 2 =
9 x 2 =
10 x 2 =
11 x 2 =
12 x 2 =
It sometimes helps to switch the numbers around!