Math problems for elementary school students

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Explanation of the steps:

Cat ++ Mouse =8kg=8π‘˜π‘”

Dog ++ Mouse =11kg=11π‘˜π‘”

Dog ++ Cat =15kg=15π‘˜π‘”

β‡’2(β‡’2(Cat ++ Mouse ++ Dog)=8+11+15=34)=8+11+15=34

β‡’β‡’ Cat ++ Mouse ++ Dog =34:2=17(kg).