Explain simply why 5 is the correct answer to: Tina made a large pan of brownies and cut it into 24 pieces. She had one with lunch and dinner every day for 5 days. Her husband snagged one per day for 5 days to take to work. They shared 4 with dinner guests. How many brownies were left?. Explanation:
Tina ate one twice a day for 5 days so 2 * 5 = 10. Her husband at 1 per day for 5 days so 1 * 5 = 5. She made 24, ate 10, her husband ate 5 and the guests ate 4 so 24 - 10 - 5 - 4 = 5 brownies left.