6. Teresa bought 3 boxes of chocolate. Each box has 9 pieces of chocolate inside. Teresa gave away 15 pieces of chocolate. How many pieces of chocolate does she have left?

Teresa started with 3 boxes of chocolates, each containing 9 pieces. To find the total, just multiply: 3 boxes x 9 pieces = 27 pieces of chocolate. After giving away 15 pieces, subtract that from the total: 27 - 15 = 12. So, Teresa has 12 pieces of chocolate left. Sweet victory! This straightforward problem showcases the classic math operations of multiplication and subtraction. It's a reminder that basic arithmetic can help answer everyday questions, like how many treats remain after sharing. A great way to incorporate math into fun situations like snack time!