1-6. 곱셈
1 8 x 2 =
2 8 x 5 =
3 1 x 3 =
4 1 x 7 =
5 7 x 1 =
6 1 x 2 =
7 9 x 4 =
8 5 x 8 =
9 9 x 9 =
10 9 x 9 =
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