(-5.9)-(-6.1)怎么算a

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(-5.9)-(-6.1)怎么算a(-5.9)-(-6.1)怎么算a(-5.9)-(-6.1)怎么算a等于+0.2

(-5.9)-(-6.1)怎么算a
(-5.9)-(-6.1)怎么算a

(-5.9)-(-6.1)怎么算a
等于+0.2