а)3/4=15/20 = 3*5/4*5 - верно
б)7:5=77/55 = 7*11/5*11 - верно
в)12/18=14:21-верно
2*6/3*6=2/3
14:21=2*7:3/7=2/3
а)3/4=0.75,15/20=0.75да,б)7/5 =1.477/55=1.4да,в12/18=0.(6)7 14/21=0.(6)7да
а)3/4=15/20 = 3*5/4*5 - верно
б)7:5=77/55 = 7*11/5*11 - верно
в)12/18=14:21-верно
2*6/3*6=2/3
14:21=2*7:3/7=2/3
а)3/4=0.75,15/20=0.75да,б)7/5 =1.477/55=1.4да,в12/18=0.(6)7 14/21=0.(6)7да