PSLE Carl had 13 more one-dollar notes than ten-dollar notes at first. He exchanged $180 worth of ten-dollar notes for one-dollar notes. How many less ten-dollar notes than one-dollar notes did Carl have after the exchange?
Number |
$1 |
$10 |
Before |
1 u + 13 |
1 u |
Change |
+ 180 |
- 18 |
After |
1 u + 13 + 180 |
1 u - 18 |
Number of ten-dollar notes that Carl exchanged into one-dollar notes
= 180 ÷ 10
= 18
Number of one-dollar notes that Carl received from the exchange
= 180 ÷ 1
= 180
Number of less ten-dollar notes than one-dollar notes
= 13 + 180 + 18
= 211
Answer: 211