Вычислите: а) (3/4+1/6)умножить на 3+(5/6-1/2): 2/9

(3/4 + 1/6 ) * 3 + (5/6 - 1/2) : 2/9 =  4  1/4
1) 3/4 + 1/6 = 9/12 + 2/12 = 11/12 
2) 11/12 * 3 = 11/4 
3) 5/6 - 1/2 = 5/6 - 3/6 = 2/6
4) 2/6 : 2/9 = 2/6 * 9/2 = 9/6
5) 11/4 + 9/6 = 66/24 + 36/24 =4  1/4