1. 5/2•48–11/3:1/18+65/12:7/36=81 6/7
1) (5•48)/2=120
2) (11•18)/3=66
3) 120–66=54
4) (65•36)/(12•7)=(65•3)/7=195/7
5) 54+195/7=573/7=81 6/7
2. 27/2•4/3+33/2•16/11+77/4:4/25 =
= 162 5/16
1) (27•4)/(2•3)=18
2) (33•16)/(2•11)=24
3) (77•25)/(4•4)=1925/16
4) 18+24+1925/16=42+1925/16=
=2597/16=162 5/16