1. (11+2*2)/18*(48/5)
(15/18)*(48/5)
(3*8)/3=8
2. (11*11-4*10)/110*(44/15)
(81/110)*(44/15)
(27*4)/(10*5)
(27*2)/(5*5)
54/25
3. (20*17-11*8)160*(46/5)
(252/160)*(46/5)
(63*46)/(40*5)
(63*23)/(20*5)
1449/100
4. (39/10)*(48/10)*(10/144)
(39*48)/(10*144)
39/30
13/10