(-2,314+1/4):1/50+(1 11/16+0,7125):(-3)= -103 299/ 3001) 1/4 = 0.25;2) - 2.314 + 0.25 = - 2.064;3) 1/50 = 0.02;4) -2.064 : 0.02 = - 103.2;5) 0.7125 = 7125/10000;6)1 11 /16 + 7025/ 10000 = 1 + 11 /16 + 7025/ 10000 = 1 + 11·625/ 16·625 + 7025·1 /10000·1 = 1 + 6875 /10000 + 7025/ 10000 = 1 + 6875 + 7025 /10000 = 1 13900 /10000 = 1 139·100 /100·100 = 1 139/ 100 = 1 / 39 + 1·100 /100 = 2 39 /100 = 2.39;7)2 39/ 100 ÷ (-3 )= 39 + 2·100/ 100 ÷ (-3) = 239/ 100 ÷(- 3 )= - 239 /100·3 = - 239/ 300 ;8) -103 2 /10 + (- 239 /300 ) = -103 2 /10 - 239 /300 = -103 - 2/ 10 - 239 /300 = -103 - 2·30 /10·30 - 239·1/ 300·1 = -103 - 60/ 300 - 239 /300 = -103 - 60 + 239/ 300 = -103 299/ 300 .