Advanced Mathematics Primary 5 Fractions

Ravi is filling a container with two ingredients. He pours in 3⅓ kg of sand and 2¾ kg of gravel. He then removes 1⅚ kg of the mixture. How many kilograms of the mixture remain in the container?

A 4 1/4 kg
B 7 11/12 kg
C 5 3/4 kg
D 4 3/4 kg
Show Worked Solution

Worked Solution

Step 1: Convert all mixed numbers to improper fractions. 3⅓ = 10/3, 2¾ = 11/4, 1⅚ = 11/6 Step 2: Find a common denominator for all three fractions (LCD of 3, 4, 6 = 12). 10/3 = 40/12 11/4 = 33/12 11/6 = 22/12 Step 3: Add the two quantities poured in. 40/12 + 33/12 = 73/12 Step 4: Subtract the quantity removed. 73/12 − 22/12 = 51/12 Step 5: Simplify. 51/12 = 4 remainder 3 → 4 3/12 = 4¼ kg Answer: 4¼ kg Answer: 4 1/4 kg

Correct answer: 4 1/4 kg

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