Jay bought a book for $25, a pen for $4, and a ruler for $1. He paid with a fifty-dollar bill. How much change, in dollars, did Jay get?
Let's be accurate as possible and think first.
20
Jay spent 25 + 4 + 1 = 30 dollars.

He received 50 - 30 = 20 dollars in change.

.

Therefore, the answer is 20