Ravi's 2-litre cooking jug has a scale marked every 0.2 litre. The water is at the 1.4-litre mark. How much more water, in ml, must Ravi add to reach the 2-litre mark?
Need a hint?
Find the difference between the full amount and the current water level, then convert litres to millilitres.
Worked answer
- 2 − 1.4 = 0.6 litre
- 0.6 litre = 600 ml
Answer: 600 ml
The mistake this question tests
Habit
Converting units (kg, ℓ, m, cm³)
Some pupils will find 0.6 litre but forget to convert it to millilitres.
How to fix it at home →Wrong answers children often give:
- 0.6 Left out the units
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See the answer →Practise PSLE measurement until the mistakes stop.
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