(-0.5)-(-3.25)-2.75-(+7.5)怎么算

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(-0.5)-(-3.25)-2.75-(+7.5)怎么算(-0.5)-(-3.25)-2.75-(+7.5)怎么算(-0.5)-(-3.25)-2.75-(+7.5)怎么算-o.5+3.25-2.7

(-0.5)-(-3.25)-2.75-(+7.5)怎么算
(-0.5)-(-3.25)-2.75-(+7.5)怎么算

(-0.5)-(-3.25)-2.75-(+7.5)怎么算
-o.5+3.25-2.75-7.5= 3.25-0.5-2.75-7.5=-7.5