A piece of ribbon is 41325 metres long. Write its length as a decimal, in metres.
Need a hint?
Multiply the top and bottom of 1325 by 4 so the denominator becomes 100.
Worked answer
- Make the fraction part have denominator 100: 25 × 4 = 100, so 1325 = 52100.
- 52100 = 0.52, so the whole part is 4 + 0.52.
- Length = 4.52 m.
Answer: 4.52 m
The mistake this question tests
Habit
Calculation slip
Copying the numerator 13 after the decimal point gives 4.13, which ignores the change of denominator.
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See the answer →Practise PSLE fractions until the mistakes stop.
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