(-5.25)x(-4.73)-4.73x(-19.75)-25x(-5.27)怎么求?
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(-5.25)x(-4.73)-4.73x(-19.75)-25x(-5.27)怎么求?
![(-5.25)x(-4.73)-4.73x(-19.75)-25x(-5.27)怎么求?](/uploads/image/z/2667741-69-1.jpg?t=%28-5.25%29x%28-4.73%29-4.73x%28-19.75%29-25x%28-5.27%29%E6%80%8E%E4%B9%88%E6%B1%82%3F)
(-5.25)*(-4.73)-4.73*(-19.75)-25*(-5.27)
=(-4.73)*[-5.25+(-19.75)]-25*(-5.27)
=(-4.73)*(-25)+(-25)*(-5.27)
=(-25)*(-10)
=250
=(-4.73)*[-5.25+(-19.75)]-25*(-5.27)
=(-4.73)*(-25)+(-25)*(-5.27)
=(-25)*(-10)
=250