Question: Maria went on a trip to Belgium. She paid $300 for the ticket and half of that for the hotel. How much money does she have left, when she had $760 at the beginning?
Answer: For the hotel Maria paid 300 / 2 = $150. So Maria has 760 - 300 - 150 = $310 left. The answer is 310.

Question: Each class uses 200 sheets of paper per day. The school uses a total of 9000 sheets of paper every week. If there are 5 days of school days, how many classes are there in the school?
Answer: Each class uses 200 x 5 = 1000 sheets of paper in a week. Thus, there are 9000 / 1000 = 9 classes in the school. The answer is 9.

Question: James buys 2 notebooks with 50 pages each. He pays $5. How many cents did each page cost?
Answer: He bought 2 * 50 = 100 pages. It cost 5 * 100 = 500 cents. So he spent 500 / 100 = 5 cents per page. The answer is 5.

Question: Peter goes to the store to buy a soda. The soda costs $.25 an ounce. He brought $2 with him and leaves with $.50. How many ounces of soda did he buy?
Answer:
He spend $1.5 on soda because 2 - .5 = 1.5. He bought 6 ounces of soda because 1.5 / .25 = 6. The answer is 6.