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Math problem, how to buy tickets is the most cost-effective problem.
① 4910 = 4 (Zhang) ... 9 people

4+ 1=5 (sheets)

200×5= 1000 (yuan)

Answer: It costs 1 000 yuan to buy five group tickets and then give the extra places to a single tourist.

or

1000-25=975 (yuan)

A: Buy five group tickets, and then sell the extra places to a single tourist, 975 yuan.

If the first one doesn't meet the requirements of the topic, use the second one. )

②200×4=800 (yuan)

25×9=225 (yuan)

800+225= 1025 (yuan)

Answer: I need four team tickets and one single ticket, so I need 1025 yuan.