The students went boating in the park. There were 60 people, and 16 boats were hired. Each big boat took 4 people, and each small boat took 3 people?
(16 × 4-60) △ 4-3, = 4 △ 1, = 4 (pieces), 16-4 = 12 (pieces); answer: 12 big boats and 4 small boats
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