Greg plowed for 2.5 hours in the morning, 1 hour and 15 minutes in the afternoon, and 1 hour 30 minutes in the evening. How many total hours did Greg plow

In hours and minutes, Greg plowed for 2.5 + 1.25 + 1.5 = <<2.5+1.25+1.5=5.25>>5.25 hours. Answer: \boxed{5.25}.