Exercising causes an athlete’s body to lose potassium, and it is important to replenish this nutrient after a race. For middle-school students, the recommended amount of potassium intake is 4.5 grams per day. If a student athlete eats a banana containing 0.54 grams of potassium, and drinks 6 ounces of orange juice containing 0.372 grams of potassium, how many more grams of potassium does she need?

How can you find how many more grams of potassium the athlete needs to reach the recommended amount?

To solve this problem, I would
subtract 4.5 - 0.54
subtract 4.5 - 0.372 and then add 0.54 to the difference
add 0.54 + 0.372 and subtract the sum from 4.5
add 0.5 + 0.372 + 4.5