Chickens and rabbits live in the same cage. 12 heads and 40 feet. How many chickens and rabbits are there in the cage? (1) Method 1: Assume that 12 chickens are all chickens, with a total of ().

(1) Method 1: Assume that 12 is a chicken and * * * has (24) feet, that is, (16) has less than 40 feet. Only two feet are needed for every (8), so there are (8) rabbits and (4) chickens.

(2) Method 2: Suppose all 12 rabbits, and * * * has (48) feet, that is, (8) 40 more feet. You have to subtract 2 feet from (4), so there are (4) chickens and (8) rabbits.

(3) Method 3: First, command them to lift 1 leg, thus losing (12) leg, and then command them to lift 1 leg, thus losing (12) leg, leaving (16) leg.

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