PSLE Ivan had 14 more one-dollar notes than five-dollar notes at first. He exchanged $45 worth of five-dollar notes for one-dollar notes. How many less five-dollar notes than one-dollar notes did Ivan have after the exchange?
Number |
$1 |
$5 |
Before |
1 u + 14 |
1 u |
Change |
+ 45 |
- 9 |
After |
1 u + 14 + 45 |
1 u - 9 |
Number of five-dollar notes that Ivan exchanged into one-dollar notes
= 45 ÷ 5
= 9
Number of one-dollar notes that Ivan received from the exchange
= 45 ÷ 1
= 45
Number of less five-dollar notes than one-dollar notes
= 14 + 45 + 9
= 68
Answer: 68