(-0.5)+(+3.25)+(+2.75)+(-6.5)

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(-0.5)+(+3.25)+(+2.75)+(-6.5)(-0.5)+(+3.25)+(+2.75)+(-6.5)(-0.5)+(+3.25)+(+2.75)+(-6.5)=[(-0.5)+(-6.

(-0.5)+(+3.25)+(+2.75)+(-6.5)
(-0.5)+(+3.25)+(+2.75)+(-6.5)

(-0.5)+(+3.25)+(+2.75)+(-6.5)
=[(-0.5)+(-6.5)]+[(+3.25)+(+2.75)]
=(-7)+6
=-1

-1