PSLE
A fruit stall sold lemons at 70¢ and mandarin oranges at 40¢ each. Julie bought some lemons and Dana bought some mandarin oranges from the stall. Julie spent $2.10 more than Dana, but had 3 fruits fewer than Dana.

1. How many lemons did Julie buy?
2. How much did Dana spend on the mandarin oranges?

	Lemons	Mandarin Oranges
Number	1 u	1 u + 3
Value	0.7	0.4
Total value	0.7 u	0.4 u + 1.2

(a)
Number of lemons that Julie bought = 1 u
Number of mandarin oranges that Dana bought = 1 u + 3

Amount that Julie paid = 0.7 x 1 u = 0.7 u
Amount that Dana paid = 0.4(1 u + 3) = 0.4 u + 1.2

If Dana spent another $2.10, both Dana and Julie would spend the same amount.

0.7 u = 0.4 u + 1.2 + 2.1
0.7 u - 0.4 u = 1.2 + 2.1
0.3 u = 3.3

1 u = 3.3 ÷ 0.3 = 11

Number of lemons that Julie bought
= 1 u
= 11

(b)
Amount that Dana spent on the mandarin oranges
= 0.4 u + 1.2
= 0.4 x 11 + 1.2
= 4.4 + 1.2
= $5.60

Answer(s): (a) 11; (b) $5.60