Easy,
So a nickel's worth in hundredths/cents/etc is...
$0.05
Now, you have $12.60 TOTAL, so just divide to find out how many nickles there are...
[tex] \frac{12.60}{0.05} [/tex]
=252
Thus, you have 252 nickles.
To check your work take 252*0.05=12.60
Thus, you know your answer is correct.