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Third-grade Olympiad Elementary School Third-grade Olympiad: There are 250 chickens and ducks, three times more than ducks. How many chickens and ducks are there? Calculation of column formula.
Solution: There are 3 times more chickens than ducks, that is, 4 times more chickens than ducks. Suppose there are x ducks, which means there are 4X chickens. Suppose that according to the meaning of the question, X+4X=250 5X=250 X=250/5=50 (only), then there are 200 chickens and 50 ducks respectively.