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The math problems of grade two are solved by the way of thinking of grade two students in primary school.
(12+11+13) ÷ 2 =18 (kg)

18- 1 1=7 (kg)

18- 12=6 (kg)

18- 13=5 (kg)

A: The black rabbit weighs 5 kg, the white rabbit weighs 6 kg and the gray rabbit weighs 7 kg.

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