A bamboo pole is 3.15 metres long. Which mixed number shows this length in metres in its simplest form?
- 3 15/100
- 3 3/20
- 3 15/20
- 3 3/10
Need a hint?
Write the digits after the decimal point over 100, then simplify that fraction as far as it goes.
Worked answer
- 3.15 means 3 whole metres and 15 hundredths of a metre.
- So the fraction part is 15/100.
- Divide top and bottom by 5: 15/100 = 3/20.
- The mixed number is 3 3/20 metres.
Answer: 3 3/20 metres
The mistake this question tests
Habit
Simplest form in final fraction answers
Pupils often stop at 3 15/100 without simplifying, or divide only the top by 5 and write 3 3/100 or 3 15/20.
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See the answer →Practise PSLE fractions until the mistakes stop.
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