(-3.14)-(+3.14)

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(-3.14)-(+3.14)(-3.14)-(+3.14)(-3.14)-(+3.14)(-3.14)-(+3.14)=(-3.14)-3.14=-6.28答案是-6.28

(-3.14)-(+3.14)
(-3.14)-(+3.14)

(-3.14)-(+3.14)
(-3.14)-(+3.14)
=(-3.14)-3.14
=-6.28

答案是-6.28