(-50)-(+27)+19-27-(-40)计算
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(-50)-(+27)+19-27-(-40)计算
(-50)-(+27)+19-27-(-40)计算
(-50)-(+27)+19-27-(-40)计算
(-50)-(+27)+19-27-(-40
=-50-27+19-27+40
=(-50-27-27)+(19+40)
=-104+59
=-45
(-50)-(+27)+19-27-(-40)
=-50-27+19-27+40
=(-50-27-27)+(19+40)
=-104+59
=-45