HOTS Mathematics Primary 5 Fractions

Mrs Lim is baking pandan cakes. Each cake requires 2⅓ cups of flour. She has 8¾ cups of flour. After baking as many cakes as possible with the flour available, she divides the remaining flour equally among 4 containers. How much flour is in each container?

A 7/16 cup
B 7/4 cups
C 1/4 cup
D 5/12 cup
Show Worked Solution

Worked Solution

Step 1: Find how many cakes can be baked. 8¾ ÷ 2⅓ = 35/4 ÷ 7/3 = 35/4 × 3/7 = 105/28 = 15/4 = 3¾. Since she can only bake whole cakes, she bakes 3 cakes. Step 2: Flour used = 3 × 2⅓ = 3 × 7/3 = 7 cups. Step 3: Remaining flour = 8¾ − 7 = 35/4 − 28/4 = 7/4 cups. Step 4: Flour per container = 7/4 ÷ 4 = 7/4 × 1/4 = 7/16 cup.

Correct answer: 7/16 cup

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