Yesterday, Tommy had 33 more stamps than Oliver. Today, Tommy gave Oliver
49 of his stamps. As a result, he has half as many stamps as Oliver now. How many stamps did Tommy have yesterday?
|
Tommy |
Oliver |
More |
Before |
9 u |
6 u |
3 u |
Change |
- 4 u |
+ 4 u |
|
After |
5 u |
10 u |
|
Comparing Tommy and Oliver in the end |
1
|
2
|
|
Number of stamps that Oliver has now
= 2 x 5 u
= 10 u
Number of stamps that Tommy had more than Oliver yesterday
= 9 u - 6 u
= 3 u
3 u = 33
1 u = 33 ÷ 3 = 11
Number of stamps that Tommy had yesterday
= 9 u
= 9 x 11
= 99
Answer(s): 99