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正负数加减乘除各50道

(1)(+11)+(-7)+(+10)+(-3)+(-11) =(+11)+(-11)+(-7)+(+10)+(-3) =0+(-7)+(+10)+(-3) =0 (2)-(-2.4)-(+3.7)+(-4.6)-(-5.7) =2.4-3.7-4.6+5.7 =(2.4+5.7)-(3.7+4.6) =8.1-8.3 =-0.2 (3)1-3+5-7+9-11++97-99 =(1-3)+(5-7)+(9-11)++(97-99) =-2+(-2)+(-2)++(-2) =-

一5X4二一20,(一5)X(一4)二20,一5一(一5)二0,一5X[一3除以3]二5,一8X(7一3)二一32,8x(2一3)二一8,8X(3一2)二8,一7X[一1十4]二一21,一7X(一1十(一3))二28,0X(一7)二0,5一(一5)二10,5十(一5)二0,4X[5一(一5

22+(-4)+(-2)+4*3 -2*8-8*1/2+8/1/8 (2/3+1/2)/(-1/12)*(-12) (-28)/(-6+4)+(-1) 2/(-2)+0/7-(-8)*(-2) (1/4-5/6+1/3+2/3)/1/2 18-6/(-3)*(-2) (5+3/8*8/30/(-2)-3 (-84)/2*(-3)/(-6) 1/2*(-4/15)/2/3 -3x+2y-5x-7y -5+21*8/2-6-59 68/21-8-11*8+61 -2/9-7/9-56 4.6-(-3/4+1.

一定要选我为最佳答案呀,多给点分(1) (-9)-(-13)+(-20)+(-2)(2) 3+13-(-7)/6(3) (-2)-8-14-13(4) (-7)*(-1)/7+8(5) (-11)*4-(-18)/18(6) 4+(-11)-1/(-3)(7) (-17)-6-16/(-18)(8) 5/7+(-1

-1+2= -2+6=

(1) (-9)-(-13)+(-20)+(-2) (2) 3+13-(-7)/6 (3) (-2)-8-14-13 (4) (-7)*(-1)/7+8 (5) (-11)*4-(-18)/18 (6) 4+(-11)-1/(-3) (7) (-17)-6-16/(-18) (8) 5/7+(-1)-(-8) (9) (-1)*(-1)+15+1 (10) 3-(-5)*3/(-15) (11) 6*(-14)-(-14)+(-13) (12) (-15)*(-13)-(-17)-(-4) (13) (-20)/13/(-7)+

[-|98|+76+(-87)]*23[56+(-75)-(7)]-(8+4+3) 5+21*8/2-6-59 68/21-8-11*8+61 -2/9-7/9-56 4.6-(-3/4+1.6-4-3/4) 1/2+3+5/6-7/12 [2/3-4-1/4*(-0.4)]/1/3+2 22+(-4)+(-2)+4*3 -2*8-8*1/2+8/1/8 (2/3+1/2)/(-1/12)*(-12) (-28)/(-6+4)+(-1) 2/(-2)+0/7-(-8)*(-2) (1/4-5/6+

1、-38)+52+118+(-62)= 2、(-32)+68+(-29)+(-68)= 3、(-21)+251+21+(-151)= 4、12+35+(-23)+0=5、(-6)+8+(-4)+12 =6、3又1/4+(-2又3/5)+5又3/4+(-8又2/5)= 7、9+(-7)+10+(-3)+(-9) =8、27+(-26)+33+(-27) =9、(+4又5/8)+(-3.257)+(-4.625)=10、

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