PSLE
A fruit stall sold dragon fruits at 70¢ and tomatoes at 40¢ each. Nora bought some dragon fruits and Ivory bought some tomatoes from the stall. Nora spent $0.80 more than Ivory, but had 4 fruits fewer than Ivory.

1. How many dragon fruits did Nora buy?
2. How much did Ivory spend on the tomatoes?

	Dragon Fruits	Tomatoes
Number	1 u	1 u + 4
Value	0.7	0.4
Total value	0.7 u	0.4 u + 1.6

(a)
Number of dragon fruits that Nora bought = 1 u
Number of tomatoes that Ivory bought = 1 u + 4

Amount that Nora paid = 0.7 x 1 u = 0.7 u
Amount that Ivory paid = 0.4(1 u + 4) = 0.4 u + 1.6

If Ivory spent another $0.80, both Ivory and Nora would spend the same amount.

0.7 u = 0.4 u + 1.6 + 0.8
0.7 u - 0.4 u = 1.6 + 0.8
0.3 u = 2.4

1 u = 2.4 ÷ 0.3 = 8

Number of dragon fruits that Nora bought
= 1 u
= 8

(b)
Amount that Ivory spent on the tomatoes
= 0.4 u + 1.6
= 0.4 x 8 + 1.6
= 3.2 + 1.6
= $4.80

Answer(s): (a) 8; (b) $4.80