Fourth grade fraction math problem

Question

Mr. Lopez mixed 3/10 liter of orange juice and 4/10 liter of pineapple juice to make one portion of fruit punch. He made 4 portions in all. How much orange juice and pineapple juice did he use in all?

Answer 1

To answer this problem quickly, we can multiply the portion sizes to make one portion by 4.

1 portion: 3/10 liters of orange juice and 4/10 liters of pineapple juice.

To answer this problem easily, we can multiply the portion sizes to make one portion by 4.

1 portion: 3/10 liters of orange juice and 4/10 liters of pineapple juice.

4 portions: 3/10 * 4 = 12/10 = 1 and 1/5 liters of orange juice and 4/10 * 4 = 16/10 = 1 and 3/5 liters of pineapple juice.

Answer 2

Hi Katie,

Since we want to know how much orange juice and pineapple juice he used for 4 portions of fruit punch separately, we begin by multiplying each fraction by 4.

(3/10) X 4 = 12/10 = 1 and 1/5 litres of orange juice, after changing the fraction to a mixed number and simplifying them.

(4/10) X 4 = 16/10 = 1 and 3/5 litres of pineapple juice, after changing the fraction to a mixed number and simplifying them.

Answer 3

If one portion of the mix has 3/10 liters of orange juice and 4/10 liters of pineapple juice and we want to know how much for four portions, we should multiply those fractions by 4 before adding them, so we know how much orange juice and pineapple juice is needed.

(3/10) × 4 = 12/10 liters of orange juice. We can convert that to a mixed number and simplify to 1 and 1/5 liters of orange juice.

(4/10) × 4 = 16/10 liters of pineapple juice. We can convert that to a mixed number and simplify to 1 and 3/5 liters of pineapple juice.