IV. Instructions: Solve the following problems using multiplication
of fractions.
1. Melanie had 18 mangoes, 24 bananas, and 30 apples. She gave her
sister of each kind of
fruit. How many fruits did her sister get in all?
2. In a survey, of the respondents said that they use a Happy
dishwashing paste. One-fourth
answered that they do not use that brand, while the remaining
respondents did not give an
answer. If there were 500 respondents in all, how many respondents
did not give an answer?
How many respondents gave an answer?
3. There was of a pie left in the fridge. Daniel ate of the leftover pie.
How much of a pie did he have?
4. There are kilograms of salt in the kitchen. Mrs. Jackson used of
the salt when she
was preparing dinner. How much salt did she use?
5. A bottle contains liters of cooking oil. of the oil was used for frying
fish. Find the amount of oil used.
Answer (1)
1. Melanie’s FruitsShe had 18 mangoes, 24 bananas, and 30 apples.She gave 1/2 of each fruit to her sister.Mangoes: 18 × 1/2 = 9Bananas: 24 × 1/2 = 12Apples: 30 × 1/2 = 15Total fruits: 9 + 12 + 15 = 36 fruits2. Survey Results1/4 did not use the brand.Total respondents = 500Did not use: 500 × 1/4 = 125Remaining who answered: 500 – 125 = 375 respondents3. Pie FractionLeftover pie = 3/4Daniel ate 1/2 of the leftover: 3/4 × 1/2 = 3/8Daniel ate 3/8 of a pie.4. Salt UsedTotal salt = 5 1/2 kg = 11/2 kgUsed 2/3 of it: 11/2 × 2/3 = 22/6 = 11/3 = 3 2/3 kg5. Cooking OilTotal oil = 6/10 litersUsed 2/4 (1/2): 6/10 × 1/2 = 6/20 = 3/10 liters
