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