33 (3 13/15 -12 3/20 -54/45 -0.85) * 3=? по действиям .

(3 13/15 -12 3/20 -54/45 -0.85) * 3=-31
3 13/15 -12 3/20=3 52/60-12 9/60=3 43/60-12=-8 17/60
54/45=1 9/45=1 1/5
-8 17/60-1 1/5=-8 17/60-1 12/60=-9 29/60
0,85=85/100=17/20
-9 29/60-17/20=-9 29/60-51/60=-9 80/60=-10 20/60=-10 1/3
-10 1/3*3=-31/3*3=-31