If you had $16.50 and spent half of that on groceries, how much would you have left?

Your buying nerf darts and each pack costs 4.50. If each pack contains 40 darts, and you want to buy 5 packs, how much money would you need?

You have 32 game peices in a game of chess, ½ of the peices are pawns. How many pawns are there in total?

You have 72 music disks and 4 of your friends borrow 10, but your friends broke 2 music disks each by accident. How many do you have now? Show your work!