PSLE Jack had 20 more one-dollar notes than ten-dollar notes at first. He exchanged $140 worth of ten-dollar notes for one-dollar notes. How many more one-dollar notes than ten-dollar notes did Jack have after the exchange?
Number |
$1 |
$10 |
Before |
1 u + 20 |
1 u |
Change |
+ 140 |
- 14 |
After |
1 u + 20 + 140 |
1 u - 14 |
Number of ten-dollar notes that Jack exchanged into one-dollar notes
= 140 ÷ 10
= 14
Number of one-dollar notes that Jack received from the exchange
= 140 ÷ 1
= 140
Number of more one-dollar notes than ten-dollar notes
= 20 + 140 + 14
= 174
Answer: 174