Выполнить действия (1 2/3+2,5)*(4 1/3 -1 5/6)= решить надо

1) 1 2/3 +2 1/2 = 3 2*2+1*3/6 = 3 4+3/6 = 3 7/6 = 4 1/6

2)4 1/3 - 1 5/6 = 3 4/3 - 1 5/6 = 2 4*2-5*1 /6 = 2 8-5/6 = 2 3/6 = 2 1/2

3)  4 1/6 * 2 1/2 = 25/6 * 5/2 = 25*5/6*2= 125/12 = 10 5/12

(1 2/3+2,5)*(4 1/3-1 5/6)=(5/3 + 5/2)*(13/3 - 11/6)=(10/6+15/6)*(26/6-11/6)=
=25/6*15/6=375/36=10 15/36