1, 2, 3 and 4 together, one * * is the weight of three elephants, three pandas, three dogs and three monkeys, which is three times the weight of four animals. A * * is (1100+1090+790).

Subtract this number with 1, the weight of elephants, pandas and dogs 1 100KG, and get the weight of monkeys100kg;

Subtract 2. The weight of elephant, panda and monkey is 1090KG, and that of dog is 20kg.

Subtract 3, the weight of elephant, dog and monkey is 790KG, and the weight of panda is 320kg；;

Subtract 4. The weight of dogs, pandas and monkeys is 350KG, and that of elephants is 760kg.

Answer over.

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