Mrs Ee gave Sarah and Eva some money each on Wednesday. On Thursday, Sarah gave
15 of the amount she had to Eva. On Friday, Eva gave
16 of the amount she had to Sarah. In the end, Sarah had $49 and Eva had $25. How much did Eva had more than Sarah at first?
| |
Sarah |
Eva |
Total |
| Before 1 |
5 u |
? |
$74 |
| Change 1 |
- 1 u |
+ 1 u |
|
| After 1 |
4 u |
6 p |
$74 |
| Before 2 |
$49 - 1 p |
6 p |
$74 |
| Change 2 |
+ 1 p |
- 1 p |
|
After 2 |
$49 |
5 p
($25) |
$74 |
Amount that Eva had in the end = 5 p
5 p = 25
1 p = 25 ÷ 5 = 5
Working backwards.
Amount that Sarah had after giving to Eva on Thursday
= 49 - 1 p
= 49 - 5
= $44
4 u = 44
1 u = 44 ÷ 4 = 11
Amount that Sarah had at first
= 5 u
= 5 x 11
= $55
Total amount that Sarah and Eva had
= 49 + 25
= $74
Amount that Eva had at first
= 74 - 55
= $19
Amount that Sarah had more than Eva
= 55 - 19
= $36
Answer(s): $36
