Exchange

Today for maths we had to learn how to exchange money to make our stack of money thin and he had to make videos of how to exchange 1 dollar notes to exchange for a 10 dollar note but we had to give him 10 1 dollar notes and then we could exchange all of our 1 dollar notes until we had all 10 dollar notes and then he had to do the same thing and but we had to exchange 10 dollar notes for 100 dollar notes.