выполните действия

а)3/4:5/6+2 1/2*2/5-1:1 1/6

3/4÷5/6=3/4×6/5=9/102 1/2×2/5=5/2×2/5=11÷1 1/6=1÷7/6=6/79/10+1=1 9/101 9/10-6/7=1 63/70-60/70=1 3/10

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