вычислите (3/4+1/6)*3+(5/6-1/2):2/9

(3/4+1/6)*3+(5/6-1/2):2/9 =4 1/4

3/4+1/6=9/12+2/12=11/12

5/6-1/2=5/6-3/6=2/6=1/3

11/12х3/1=33/12=11/4

1/3:2/9=1/3х9/2=3/2

11/4+3/2=11/4+6/4=17/4=4 1/4