Вычислите : 6/7:2 1/7:2 15/11:5 17/11:5.
6/14 1/14 15/55 или 3/11 17/55
6/7:2=6/7*1/2=3/7 1/7:2=1/7*1/2=1/14 15/11:5=15/11*1/5=3/11 17/11:5=17/11*1/5=17/55