PSLE Owen had 12 more ten-dollar notes than fifty-dollar notes at first. He exchanged $450 worth of fifty-dollar notes for ten-dollar notes. How many more ten-dollar notes than fifty-dollar notes did Owen have after the exchange?
Number |
$10 |
$50 |
Before |
1 u + 12 |
1 u |
Change |
+ 45 |
- 9 |
After |
1 u + 12 + 45 |
1 u - 9 |
Number of fifty-dollar notes that Owen exchanged into ten-dollar notes
= 450 ÷ 50
= 9
Number of ten-dollar notes that Owen received from the exchange
= 450 ÷ 10
= 45
Number of more ten-dollar notes than fifty-dollar notes
= 12 + 45 + 9
= 66
Answer: 66