Выполните деление : 1 целая 7/9 : 8 , 4 целых 1/2 : 6 , 5 целых 1/7 :12

1) 1 целых 7/ 9 ÷ 8 = 7 + 1·9 /9 ÷ 8 = 16 /9 ÷ 8 = 16 /9·8 = 16/ 72 = 2·8/ 9·8 = 2 /9 ;2) 4 целых 1/ 2 ÷ 6 = 1 + 4·2/ 2 ÷ 6 = 9/ 2 ÷ 6 = 9/ 2·6 = 9 /12 = 3·3 /4·3 = 3/ 4 ;3) 5 целых 1/ 7 ÷ 12 = 1 + 5·7/ 7 ÷ 12 = 36 /7 ÷ 12 = 36/ 7·12 = 36/ 84 = 3·12 /7·12 = 3/ 7 .