(7 4/13-4 4/13):0.15-4:(13 6/13+11 7/13)=3:0.15-4:25=300:15-4/25=20-0.16=19.84
1)5,52:0,69=8
2)6,9-8= -1,1
3)-1,1-0,85= -1,95
4)5-0,125=4,875
5)3,7+0,05=3,75
6)-1,95*4,875= -9,50625
7)-9,50625:3,75= -2,535