1用一个空杯子向空瓶倒水,倒进三杯,连瓶重0.74;如果倒进五杯水,连瓶重1.1kg.一杯水和这个瓶子重多少千克?

2个回答

  • 1.一杯水:(1.1-0.74)÷(5-3)

    =0.36÷2

    =0.18(kg)

    瓶重:0.74-0.18×3

    =0.74-0.54

    =0.2(kg)

    2.一袋牛奶:(12.85-5.35)÷(50-20)

    =7.5÷30

    =0.25(kg)

    纸箱:5.35-0.25×20

    =5.35-5

    =0.35(kg)

    希望对你有帮助,望采纳.