Ответ:
55/72×2/11=5/36
11/15×105/143=7/13
2 3/5×40/273=8/21
63/480×1 6/9=7/32
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Ответ:
55/72×2/11=5/36
11/15×105/143=7/13
2 3/5×40/273=8/21
63/480×1 6/9=7/32