Ответ №1
19/21-5/6=38/42-35/42=3/42=1/14
3/7-13/35=15/35-14/35=1/35
3/8+7/72=27/72+7/72=34/72=17/36
1/7-1/8=8/56-7/56=1/56
Ответ №1
19/21-5/6=38/42-35/42=3/42=1/14
3/7-13/35=15/35-14/35=1/35
3/8+7/72=27/72+7/72=34/72=17/36
1/7-1/8=8/56-7/56=1/56
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