Winnie and Kathy have 320 erasers altogether. Kathy has four times as many erasers as Winnie. How many erasers must Kathy give to Winnie so that they have the same number of erasers?
| |
Winnie |
Kathy |
Total |
| Before |
1 u |
4 u |
320 |
| Change |
+ ? |
- ? |
|
| After |
160 |
160 |
320 |
Total number of erasers that Winnie and Kathy have
= 1 u + 4 u
= 5 u
5 u = 320
1 u = 320 ÷ 5 = 64
Number of erasers that Winnie and Kathy each has in the end
= 320 ÷ 2
= 160
Number of erasers that Kathy must give to Winnie
= 160 - 64
= 96
Answer(s): 96
