A pen costs $2.09. It costs $0.45less than a marker. Ken paid for one pen and one maker with a five-dollar bill. Use a tape diagram with calculation to determine him change.

Answer is 1.27 because 2.09- 0.45 = 1.64( because we are trying to forget out how much the marker cost) and 1.64 + 2.09= 3.73 ( to see how much it will be in total ) and well 5 - 3.73 = 1.64 ( to see the change they will give him )