(-0.5)+(3又1/4)+2.75+(-5又1/2) =
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![(-0.5)+(3又1/4)+2.75+(-5又1/2) =](/uploads/image/z/2640705-33-5.jpg?t=%EF%BC%88-0.5%EF%BC%89%2B%EF%BC%883%E5%8F%881%2F4%EF%BC%89%2B2.75%2B%EF%BC%88-5%E5%8F%881%2F2%EF%BC%89+%3D)
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(-0.5)+(3又1/4)+2.75+(-5又1/2) =
(-0.5)+(3又1/4)+2.75+(-5又1/2) =
(-0.5)+(3又1/4)+2.75+(-5又1/2) =