(1)-1又1/2+1/2= (2)-1又1/2+(-1/2)= (3)-3/4+0.75= (4)-1/2+1/3= (5)-1/4+(-1/3)=

(6)-1.125+(-1/8)=

(7)2又3/5+(3又1/5)=
(8)1/3=(-3/4)=
(9)1又1/2+( )=1
(10)-2+( )=-2
(11)-1+( )=1
(12)( )+2004=0
(13)1.25+( )=-1.25
(14)-2004+( )=2005

(1)-1又1/2+1/2=-1
(2)-1又1/2+(-1/2)=-2
(3)-3/4+0.75=0
(4)-1/2+1/3=-1/6
(5)-1/4+(-1/3)=-7/12
(6)-1.125+(-1/8)=-1.25
(7)2又3/5+(3又1/5)=5又4/5

(8)1/3-(-3/4)=13/12
(9)1又1/2+( -1/2)=1
(10)-2+( 0)=-2
(11)-1+( 1)=1
(12)( -2004)+2004=0
(13)1.25+(-2.5 )=-1.25
(14)-2004+( 4009)=2005
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第1个回答  2012-09-16
(1)~(5): -1, -2, 0, -1/6, -7/12
(6)~(10): -1.5, 5.8, ?, -1/2, 0
(11)~(14): 2, -2004, 0, 2009
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