1. Sarah buys a sandwich for $6.50 and a drink for $2.75. What is the total cost?

2. Tom pays $20.00 for items costing $13.45. How much change should he receive?

3. Which payment method gives the correct change for a $8.35 purchase?

4. Calculate the total cost: 3 pies at $4.50 each and 2 bottles of juice at $3.25 each.

5. Emma has $50.00 to spend at the school canteen. She buys lunch for $12.80, a muffin for $3.50, and a bottle of water for $2.20. How much money does she have left?

6. A shop offers a "Buy 2, Get 1 Half Price" deal on books that normally cost $15.90 each. What is the total cost for 3 books with this deal?

7. Jake wants to buy 4 items: a notebook ($8.75), 2 pens ($3.40 each), and a ruler ($2.95). He pays with a $20 note. Show your working to find his change.

8. At the movies, tickets cost $14.50 for adults and $9.50 for children. Popcorn costs $6.80 and drinks cost $4.20. Calculate the total cost for 2 adults, 1 child, 2 popcorns, and 3 drinks.

9. Mia is saving for a bike that costs $285.00. She has already saved $127.50. If she saves $15.50 each week, how many more weeks will it take her to afford the bike?

10. A class of 24 students is going on a trip. The bus costs $180.00 total, and each student needs to pay an equal share. If 3 students are absent on the day, how much extra must each of the remaining students pay?

11. Explain in your own words: Why is it important to check your change when making purchases?