Gail has some bills in her wallet which amount to $100. She has four $5 bills and three $20 bills, and the rest are $10 bills. How many $10 bills are in her wallet?
Four $5 bills amount to $5 x 4 = $<T>multiply(5, 4)=20
Three $20 bills amount to $20 x 3 = $<T>multiply(20, 3)=60
So Gail's $5 and $20 bills amount to $20 + $60 = $80.
Thus, her $10 bills amount to $100 - $80 = $20.
Therefore, she has $20/$10 = <T>divide(20, 10)=2.0 $10 bills.
