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17/17
1
68/2
34/2
17/17
1. mcd:17
42/2
21/3
7/7
1
45/3
15/3
5/5
1. mcd:3
60/2
30/2
15/3
5/5
1
100/2
50/2
25/5
5/5
1. mcd:2×2×5=20
15/3
5/5
1
60/2
30/2
15/3
5/5
1
105/3
35/5
7/7
1. mcd=3×5=15