Katie's mom gave her $20.00 to buy school supplies. Katie needs to buy 3 binders and some mechanical pencils. If each binder costs $3.25 and each mechanical pencil costs $1.50, how many mechanical pencils can Katie buy using only the money her mom gave her?
So Katie NEEDS 3 binders so that is given. 3.25 times 3 is 9.75 so subtract that from 20 which is 10.25. Divide 10.25 by 1.5 and get 6.8. You cant buy .8 of a pencil so you go down to 6.
