Question

4. Sasha has seven ten dollar bills and 5 one dollar bills. She plans to get some things out of

a vending machine (that does only takes one dollar bills) with a friend later, so she
exchanges some of her tens for ones. If Sasha now has 15 one dollar bills, how many ten
dollar bills does she have? How do you know?

Answer 1

Answer: 6 ten dollar bills

Explanation:

At the start Sasha had seven ten dollar bills and 5 one dollar bills. It then says she has 15 one dollar bills after the exchange, she exchanged one ten dollar bill for 10 one dollar bills adding up to 15 one dollar bills and six ten dollar bills.