-(-71又1/2)= -丨-8丨=

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-(-71又1/2)=-丨-8丨=-(-71又1/2)=-丨-8丨=-(-71又1/2)=-丨-8丨=-(-71又1/2)=71又1/2-丨-8丨=-81.143/22.-871又1/2-8-(-71

-(-71又1/2)= -丨-8丨=
-(-71又1/2)= -丨-8丨=

-(-71又1/2)= -丨-8丨=
-(-71又1/2)= 71又1/2
-丨-8丨= - 8

1.143/2 2.-8

71又1/2 -8

-(-71又1/2)=35.5
-丨-8丨= - 8

71又1/2
8

71又1/2也就是71.5
-8