PSLE Caden had 19 more one-dollar notes than five-dollar notes at first. He exchanged $50 worth of five-dollar notes for one-dollar notes. How many less five-dollar notes than one-dollar notes did Caden have after the exchange?
Number |
$1 |
$5 |
Before |
1 u + 19 |
1 u |
Change |
+ 50 |
- 10 |
After |
1 u + 19 + 50 |
1 u - 10 |
Number of five-dollar notes that Caden exchanged into one-dollar notes
= 50 ÷ 5
= 10
Number of one-dollar notes that Caden received from the exchange
= 50 ÷ 1
= 50
Number of less five-dollar notes than one-dollar notes
= 19 + 50 + 10
= 79
Answer: 79