Выполните действия а)3/4:5/6+2 1/2*2/5-1:1 1/6

Question

Выполните действия

а)3/4:5/6+2 1/2*2/5-1:1 1/6

Answer 1

А) 3/4 / 5/6 + 2 1/2 * 2/5 - 1/ 1 1/6 = 9/10 + 5/2 *2/5 -1 / 7/6 = 9/10 + 1 - 6/7 =
19/10 - 6/7 =  133/70 - 60/70 = 73/70 = 1 3/70

Answer 2

3/4÷5/6=3/4×6/5=9/10
2 1/2×2/5=5/2×2/5=1
1÷1 1/6=1÷7/6=6/7
9/10+1=1 9/10
1 9/10-6/7=1 63/70-60/70=1 3/10