2/33и11/99=2/99 и 11/99 общ. знам. 99
4/11 и 3/5=4/55 и 3/55 общ. знам. 55
8/20 и 12/36= 8/15 и 12/15 общ. знам. 15
2/33 и 11/99 =33; 4/18 и 3/5 =90; 8/20 и 12/36=180
2/33и11/99=2/99 и 11/99 общ. знам. 99
4/11 и 3/5=4/55 и 3/55 общ. знам. 55
8/20 и 12/36= 8/15 и 12/15 общ. знам. 15
2/33 и 11/99 =33; 4/18 и 3/5 =90; 8/20 и 12/36=180