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92 1) 3/5 и 2/4 = 12/20 и 10/20 2) 7/8 и 5/7 = 49/56 и 40/56 3) 5/9 и 3/16 = 80/144 и 27/144 4) 8/9 и 3/5 = 40/45 и 27/45 5) 12/16 и 3/12 = 36/48 и 12/48 6) 7/18 и 2/27 = 21/54 и 4/54