(80.54:2.2+3.3):1.1+0.9

(80,54:2,2+3,3):11+0,9
(4027/50:11/5+33/10):11/10+9/10
(4027/50*5/11+33/10)*10/11+9/10
(4027/10*1/11+33/10)*10/11+9/10
(4027/110+33/10)*10/11+9/10
439/11*10/11+9/10
4390/121+9/10
44989/1210

80‚54:2‚2+3‚3 :1‚1+0‚9=40‚50