Yesterday, Eric had 66 more stamps than Tommy. Today, Eric gave Tommy
59 of his stamps. As a result, he has half as many stamps as Tommy now. How many stamps did Eric have yesterday?
|
Eric |
Tommy |
More |
Before |
9 u |
3 u |
6 u |
Change |
- 5 u |
+ 5 u |
|
After |
4 u |
8 u |
|
Comparing Eric and Tommy in the end |
1
|
2
|
|
Number of stamps that Tommy has now
= 2 x 4 u
= 8 u
Number of stamps that Eric had more than Tommy yesterday
= 9 u - 3 u
= 6 u
6 u = 66
1 u = 66 ÷ 6 = 11
Number of stamps that Eric had yesterday
= 9 u
= 9 x 11
= 99
Answer(s): 99