You have q quarters, d dimes, and n nickels in a piggy bank. How would you write an expression for the total value of coins in dollars?

1 Answer
Jan 28, 2017

Answer:

#1/4q + 1/10d + 1/20n#

Explanation:

If you had one quarter, it would be worth #25# cents, or #0.25# dollars.

#0.25 = 1/4# (that's why it's called one quarter)

Similarly, one dime is worth #10# cents, or #1/10# of a dollar,

and a nickel is worth #5# cents, which is #1/20# of a dollar,

all because a dollar is worth #100# cents.