Priya, a market stall owner, had 4.8 kg of rice at first. After selling some rice, she had 3.65 kg left. How many grams of rice did Priya sell?
Need a hint?
Convert both masses into grams before finding how much rice was sold.
Worked answer
- 4.8 kg = 4.8 × 1000 g = 4800 g.
- 3.65 kg = 3.65 × 1000 g = 3650 g.
- Mass sold = 4800 g − 3650 g = 1150 g.
The mistake this question tests
Converting units (kg, ℓ, m, cm³)
Some pupils may subtract 4.8 from 3.65 directly because the masses are in different forms. Both masses must first be converted into the same unit.
How to fix it at home →Wrong answers children often give:
- 115 Converting units (kg, ℓ, m, cm³)
- 1.15 Converting units (kg, ℓ, m, cm³)
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See the answer →Practise PSLE measurement until the mistakes stop.
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