35 Zoe's money was equal to
23 of Shiyun's money at first. After Zoe spent $2.20 and Shiyun spent $0.70, Zoe had
25 as much money as Shiyun.
- How much did Shiyun have at first? Express your answer in 2 decimal places.
- How much did Zoe have in the end? Express your answer in 2 decimal places.
| |
Make p the same
(3)x5 |
Zoe
(1) |
Shiyun
(2) |
Make p the same
(4)x2 |
| Before |
50 u |
10 u |
9 u |
18 u |
| Change |
- 11 |
- 2.2 |
- 0.7 |
- 1.4 |
| After |
10 p |
2 p |
5p |
10 p |
35 Zoe's money =
23 Shiyun's money
610 Zoe's money =
69 Shiyun's money
Zoe's money : Shiyun's money = 10 : 9
(3) = (4)
50 u - 11 = 18 u - 1.4
50 u - 18 u = 11 - 1.4
32 u = 9.6
1 u = 0.3
Amount Shiyun has at first
= 9 u
= 9 x 0.3
= 2.7 (a)
Amount Zoe has in the end
= 10 u - 2.2
= (10 x 0.3) - 2.2
= 0.8 (b)
Answers: (a) $2.70; (b) $0.80
