Question

Mrs. Mazzucco dumps out her change purse and finds that

she has 15 coins, all dimes and quarters, for a total of $2.70.
How many quarters does she have?

Answer 1

Answer: 10 quarters and 2 dimes.

Explanation:

4 quarters = 1 dollar

1 quarter = 25 cents

1 dime = 10 cents

If 4 quarters are 1 dollar then 2 dollars would be 8 quarters.
8 quarters + 2 quarters (50 cents) would be 2.50

You cant add another quarter or that would be 2.75.

Instead you do: 10 quarters + 2 dimes = 2.70
So to sum it all up there are 10 quarters and 2 dimes.