Xuan had 40 more erasers than Wendy. After Wendy gave away
35 of her erasers, Xuan had five times as many erasers as Wendy. How many erasers did Wendy have at first?
| |
Xuan |
Wendy |
Comparing Xuan and
Wendy at first |
40 more |
|
| Before |
10 u |
5 u |
| Change |
|
- 3 u |
| After |
10 u |
2 u |
Comparing Xuan and
Wendy in the end |
5x2 =
10 u |
1x2 =
2 u |
Number of erasers that Wendy had in the end is repeated. Make the number of erasers that Wendy had in the end the same. LCM of 1 and 2 is 2.
Number of erasers that Xuan had at first = 10 u
Number of erasers that Xuan had more than Wendy at first
= 10 u - 5 u
= 5 u
5 u = 40
1 u = 40 ÷ 5 = 8
Number of erasers that Wendy had at first
= 5 u
= 5 x 8
= 40
Answer(s): 40
