HOTS Mathematics Primary 5 Decimals

A carton of 1 000 paper clips weighs 2.45 kg. How many times heavier is the full carton than a box of 10 paper clips?

A 100 times
B 10 times
C 1 000 times
D 245 times
Show Worked Solution

Worked Solution

Step 1: Weight of 1 clip = 2.45 ÷ 1 000 = 0.00245 kg. Step 2: Weight of 10 clips = 0.00245 × 10 = 0.0245 kg. Step 3: Ratio = 2.45 ÷ 0.0245 = 100. Alternative: 1 000 clips ÷ 10 clips = 100, so the carton is 100 times as heavy. Shortcut: Dividing by 1 000 then multiplying by 10 is the same as dividing by 100.

Correct answer: 100 times

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