<p> Maddy’s First Debit Card</p><p>Common Core Standard</p><p>7.NS.A.1. Apply and extend previous understandings of addition and subtraction to add and subtract rational numbers; represent addition and subtraction on a horizontal or vertical number line diagram.</p><p>The Task</p><p>Maddy’s parents gave her a prepaid debit card to use for her monthly expenses. At the beginning of each month he parents add $50 to the card. The card can have a negative balance, but if it does she is charged a $10 service charge.</p><p>Maddy’s Monthly Expenses: Cell Phone Bill: $10</p><p>Maddy’s January Expenses: Bought her friend a gift for $15.53 Went to the movies for $13.75 Bought three pairs of earrings at $4.75 each</p><p>Maddy’s February Expenses: Bought frozen yogurt for $4.45 Went to the movies for $10.05</p><p>Maddy’s March Expenses: Went shopping and spent $18.20 Bought a pretzel for $3.25</p><p>Maddy’s April Expenses: Brought frozen yogurt twice for $4.50 each Went shopping and spent $19.14 Date Transaction Payment (-) Deposit (+) Balance</p><p>She is hoping to buy a $40 ticket to the Imagine Dragons concert in end of April. Will she have enough money on her card to purchase the ticket?</p><p>Follow-Up Questions</p><p>1. How much money will Maddy have at the end of the 4th month? 2. How much Money does Maddy have at the end of each month? 3. If the concert is in the May and Maddy does not spend any of her money how much will she have to spend at the concert? What could she buy with her money at the concert? How much do you think these items would cost? 4. If Maddy saves all her money for 5 months how much money will be have saved up? 5. Suppose there is a $5 a monthly fee for the debit card, how would that change your calculations? Would Maddy still have enough money to buy the concert ticket?</p><p>Date Transaction Payment (-) Deposit (+) Balance </p>