Приведите дробь к общему знаменателю:: 1/30 и 1/50 , 1/24 и 1/120 , 3/40 и 7/25 , 5/12 и 7/8 , 2/55 и 5/22 , 1/48 и 1/72 , 9/35 и 11/42.

1)1/30 и 1/5030=2·3·550=2·5·5Н.О.З(30;50)=2·3·5·5=1501/30=5/1501/50=3/1502)1/24 и 1/2024=2·2·2·320=2·2·5Н.О.З(24;20)=2·2·2·3·5=1201/24=5/1201/20=6/1203)3/40 и 7/2540=2·2·2·525=5·5Н.О.З(40;25)=2·2·2·5·5=2003/40=15/2007/25=56/2004)5/12 и 7/812=2·2·38=2·2·2Н.О.З.(12;8)=2·2·3·2=245/12=10/247/8=21/245)2/55 и 5/2255=5·1122=2·11Н.О.З.(55;22)=5·11·2=1102/55=4/1105/22=25/1106)1/48 и 1/7248=2·2·2·2·372=2·2·2·3·3Н.О.З.(48;72)=2·2·2·2·3·3=1441/48=3/1441/72=2/1447)9/35 и 11/4235=5·742=2·3·7Н.О.З.(35;42)=5·7·2·3=2109/35=54/21011/42=55/210