Mr.Robin assign 3/4 hour of homework each day to his students for 4 days in a row. How many total hours of homework does Mr.Robin assign his students?
3/4 of an hour is 45 minutes. Multiply 45 by 4. You get 180 minutes. Divide by 60 and Mr. Robinson gives his students a total of 3 hours of homework over the course of 4 days.