Вычисли: 6/7÷2, 1/7÷2, 15/11÷5, 17/11÷5
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