(-5)-(+3)+(-9)-(-7)+二分之一怎么算 1-2+3-4+5-6+.+2009-2010怎么算

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(-5)-(+3)+(-9)-(-7)+二分之一怎么算 1-2+3-4+5-6+.+2009-2010怎么算

(-5)-(+3)+(-9)-(-7)+二分之一怎么算 1-2+3-4+5-6+.+2009-2010怎么算
(-5)-(+3)+(-9)-(-7)+二分之一怎么算 1-2+3-4+5-6+.+2009-2010怎么算

(-5)-(+3)+(-9)-(-7)+二分之一怎么算 1-2+3-4+5-6+.+2009-2010怎么算
=-5-3-9+7+0.5
=-10+0.5
=9.5
1-2+3-4+5-6+.+2009-2010
=-1-1-1-.-1(2010/2=1005个)
=-1005

-10+1/2=-9又1/2
(1-2)+(3-4)+(5-6)+...+(2009-2010)=-1005

(-5)-(+3)+(-9)-(-7)+二分之一=-8+(-9)-(-7)+二分之一=-17-(-7)+二分之一
=-10+二分之一= -9又二分之一
1-2+3-4+5-6+....+2009-2010=(1-2)+(3-4)+(5-6)+....+(2009-2010)=(-1)×1005
=-1005

(-5)-(+3)+(-9)-(-7)+1/2=-5-3-9+7+0.5=-9.5
1-2+3-4+5-6+....+2009-2010= (1-2)+(3-4)+(5-6)+....+(2009-2010)
=-1-1-1...-1=(-1)*2010/2=-1005

-505,(1-2)+(3-4)+....+(2009-2010)=-505

9宫格填1到9个数字帮帮忙(5)()()()(7)()(3)()()()(9)()(5)()()(4)()()()()(4)()()()(7)()()()(5)(1)()(3)(7)(2) 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 (3/7)×(4/9)+(5/9)×(3/7)怎么简算 请帮我做一下这道数独.5()()2()() 7 4()1()()()7 3 6 ()()2()9()4()3()()()5()4 3()()7 8 3()()()()9()()64 1()()2()()9()() ()7() ()() 2 6 ()()5()() ()()()()()3()()8 9 ()() () 7 ()()2 3 ()() 6 ()()()9 ()() 8 ()()()()7()()()() 2 () 九宫格数字题( )( )( )( )(9)( )( )( )( )(1)(6)( )(7)( )(5)( )(9)(3)( )(7)(3)( )( )( )(4)(5)( )( )(3)(7)( )(1)( ) 一共有81格()()5 8()()()()()()()()()7()2()9()()()()9()()()()3 ()()4()1()2()()()()()8()3 7()()1 2 7()()( 求九宫格答案2()()()9()()()4 ()8()76()()3()()()7()1()5()6 531()()()42()9()()8()56()7()7()()413()()()()9()8()25( (5/6-3/9)*(0.25+5/7) (7/9-5/18)×(3/4+5/8) 横竖9个方格填1-9数字不能重复1.(5)()()(2)()()(7)(4)() 2.(1)()()()(7)(3)(6)()() 3.(2)()(9)()(4)()(3)()() 4.()(5)()(4 横竖9个方格填1-9数字不能重复1.(5)()()(2)()()(7)(4)() 2.(1)()()()(7)(3)(6)()() 3.(2)()(9)()(4)()(3)()() 4.()(5)()(4 () 4 () () 5 () ()()()() 6 9 () 7 1 ()()()2 ()() ()()() () 1 ()()()() 8 ()() 1 ()()() 7 () ()() 9 ()()()()() 3 帮我数独~~数独天才快来()5()()()()7()()()()4()()()()()88()3()5 1 ()()()()3() ()()7()()5()()()5 9 2()()()6()( 1()2()3()4()5()6()7()8()9=36填“+”,“-” 数学题找规律“?”是什么数字:(1,3)、(5,9)、(7,13)、(9,) 24点 (1)1 1 9 8 (2)9 9 5 7 (3)9 9 9 7 ()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(