(-1)+2+(-3)+4+(-5)+.+(-99)+100
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x){CNm#m43MAL=0640I*'U~
Y<ٱɎUOv4<]i~;v-x}ںɮ)O{,.H̳ ck
(1) (2) (3) (4) (5)
1)2)3)4)5)
1) 2) 3) 4) 5)
0-(+2/1)-(+5/2)-(-4/3)-(+4/1)-(-5/3)
-1-(-2)-(+3)+(-4)-(-5)
()2()()()()()8()()()8()5()1()()()1 5 8()4 6 2()2()()1 8 3()()5()()()()4()()()()8()()6 2 5 ()()()15 9 2 4 1 6 7 3 8(
(1-2)(1-3)(3-4)(4-5)...(19-20)=
计算 (-1)+(+2)+(-3)+(+4)+(-5)+.+(-2009)+(+2010)
(-1)+(+2)+(-3)+(+4)+(-5)+...+(-2011)+(+2012)
9()2()7()8()()()()4()()9()6()1 3()5()()()()24()()8 5()()1()()8 9 4()1 6 7()()1()()3 6()()88()()()()2()3 6()5
1/2+(-2/3)-(-4/5)+(-1/2)-(+1/3)
(1)(4-5i)(5-i) (2)(1-3i)²
(-1)*(-2)*(-3)+(-2)*(-3)*(-4)+(-3)*(-4)*(-5)+~+(-100)*(-101)*(-102)
4×(-1/2²)-3/2×(-2/5)
()3( ) × ( )6 ------------- 1 ( )( ) 6( ) ( ) 5------------- 8 ( )( ) ( )()3( ) × ( )4 ------------- 2 ( )2 8( )1 ( ) 0------------- 3 ( ) 1 ( ) 8
5/9+(3/4-1/2)
4/5+(3/8-1/2)
0-(+2/1)-(+5/2)-(-4/3)-(+4/1)