Chua Tian Long Jeremy's answer to Tiffany's Primary 4 Maths Singapore question.
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First, we calculate how much sugar Jenny sold. She sold 4/5 of her original 15 kg of sugar:
\[ \frac{4}{5} \times 15 = 12 \text{ kg} \]
Next, we determine how much sugar was left after this sale. Jenny originally had 15 kg, and she sold 12 kg:
\[ 15 - 12 = 3 \text{ kg} \]
After selling, Jenny used 3/7 kg of the remaining sugar to bake tarts. So, we subtract this amount from the sugar left:
\[ 3 - \frac{3}{7} = \frac{21}{7} - \frac{3}{7} = \frac{18}{7} \]
Thus, Jenny has \(\frac{18}{7}\) kg or approximately 2.57 kg of sugar left.
\[ \frac{4}{5} \times 15 = 12 \text{ kg} \]
Next, we determine how much sugar was left after this sale. Jenny originally had 15 kg, and she sold 12 kg:
\[ 15 - 12 = 3 \text{ kg} \]
After selling, Jenny used 3/7 kg of the remaining sugar to bake tarts. So, we subtract this amount from the sugar left:
\[ 3 - \frac{3}{7} = \frac{21}{7} - \frac{3}{7} = \frac{18}{7} \]
Thus, Jenny has \(\frac{18}{7}\) kg or approximately 2.57 kg of sugar left.
Date Posted:
6 months ago
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