Question: John goes to the market with 100. He buys a roast for 17 and vegetables for 11. How much money does he have left?
Answer with step-by-step thinking: He spent 17 + 11 = 28. So, he still has 100 28 = 72 remaining.
So the answer is 72.

Question: Joanie wants to join a gym to get into shape. The gym costs $12 per month and has a $50 down payment. How much will she need to pay for the first 3 years?
Answer with step-by-step thinking: The membership costs $12 * 12 months = $144 per year. For three years, the monthly membership fee will be $144 * 3 = $432. The total amount paid for 3 years will be $432 + $50 = $482.
So the answer is 482.

Question: Hannah brought $30 to the county fair. She spent half of it on rides and another $5 on dessert. How much, in dollars, is left?
Answer with step-by-step thinking:
She spent $30 / 2 = $15 on rides. She spent a total of $15 + $5 = $20 including dessert. She has $30 - $20 = $10 left.
So the answer is 10.