з)29/60 и 109/12660=2·2·3·126=2·3·3·7Н.О.З=2·2·3·5·3·7=126029/60= 29·21/60·61=609/1260109/126=109·10/126·10=1090/1260609/1260 и 1090/1260и)139/270 и 71/450270=2·5·3·3·3450=2·5·5·3·3·Н.О.З.= 2·5·3·3·3·5=1350139/270=139·5/270·5=695/135071/450=71·3/450·3=213/1350695/1350 и 213/1350к) 17/104 и 59/338104=2·2·2·13338=2·169Н.О.З=2·2·2·13·169=1757617/104=17·5/104·169=85/1757659/338=59·52/17576=3068/1757685/17576 и 3068/17576