Ben has
311 as many cards as Glen. They have a total of 280 cards. How many cards must Glen give to Ben so that they will have the same number of cards?
| |
Ben |
Glen |
Total |
| Before |
3 u |
11 u |
14 u |
| Change |
+ ? |
- ? |
|
| After |
140 |
140 |
280 |
Total number of cards
= 3 u + 11 u
= 14 u
14 u = 280
1 u = 280 ÷ 14 = 20
Number of cards that each of them has in the end
= 280 ÷ 2
= 140
Number of cards that Ben has
= 3 u
= 3 x 20
= 60
Number of cards that Glen must give Ben
= 140 - 60
= 80
Answer(s): 80
