а) 1/2 = 10/20 - доп.множ. 101/4 = 5/20 - доп.множ. 51/5 = 4/20 - доп.множ. 4 1/10 = 2/20 - доп.множ. 2б) 5/12 = 15/36 - доп.множ. 34/9 = 16/36 - доп.множ. 45/6 = 30/36 - доп.множ. 63/4 = 27/36 - доп.множ. 9в) 7/30 = 14/60 - доп.множ. 29/20 = 27/60 - доп.множ. 311/15 = 44/60 - доп.множ. 47/12 = 35/60 - доп.множ. 5г) 2/5 = 40/100 - доп.множ. 20 3/4 = 75/100 - доп.множ. 25 8/25 = 32/100 - доп.множ. 4 3/50 = 6/100 - доп.множ. 2