(+1)+(-3)+(+5)+(-7).+(+2005)+(-2007)+(+2009)+(-2011)=
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/26 23:30:31
(+1)+(-3)+(+5)+(-7).+(+2005)+(-2007)+(+2009)+(-2011)=
(+1)+(-3)+(+5)+(-7).+(+2005)+(-2007)+(+2009)+(-2011)=
(+1)+(-3)+(+5)+(-7).+(+2005)+(-2007)+(+2009)+(-2011)=
原式
= (1 - 3) + (5 - 7) + ...+ (2005 - 2007) + (2009 - 2011)
= (-2) + (-2) + ...+ (-2) + (-2)
= (-2) × 503
= -1006
1、().()5* 2()--------------()3()()1()--------------2.()()52、()()()* 8.9---------------()()()()()()()---------------()()()()3、 ().7()()()
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
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)
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()()(
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()()
()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(
帮我数独~~数独天才快来()5()()()()7()()()()4()()()()()88()3()5 1 ()()()()3() ()()7()()5()()()5 9 2()()()6()(
计算:(+1)+(-3)+(+5)+(-7)……+(+2009)+(-2011)
计算:(+1)+(-3)+(+5)+(-7)+…+(+97)+(-99)
() 4 () () 5 () ()()()() 6 9 () 7 1 ()()()2 ()() ()()() () 1 ()()()() 8 ()() 1 ()()() 7 () ()() 9 ()()()()() 3
(-5)*(+7 1/3)+(+7)*(-7 1/3)-(+12)*7 1/3 简便方法计算
找规律1,2,3,5,8,()()7,8,6,7,5,()()
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(
(-12)+(+3) (+8)+(-7) (-3分之1)+5分之2
(1).6(x/3+x-1/2 ) (2).(7-3a)+(5a-6) (3).(x-3)-(5x+7)
(1) (-3)-( )=1 (2) ()-7=-2(3) -5-()=0
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