Explanation: A practical skill to learn is to know how to calculate the change from a $1 bill when you make a small purchase. You may simply subtract the amount of your purchase from 100 cents or you can use the 'count up' method.
Purchase: 35 cents 'Count up' to the next multiple of 10 which is 40 (5 cents) and then 'count up' from 40 to 100 (60 cents). Your change will be 5 + 60 or 65 cents. Easy!
Purchase: 70 cents 'Count up' from 70 to 100 (30 cents). Your change will be 30 cents. Easy!
Directions: Strive to easily determine the change from a $1 bill and then strive to increase your speed. Good luck and enjoy the challenge!