谁给我20到有理数混合运算?要加减乘除都有的,20道,不要太简单也不要太麻烦

谁给我20到有理数混合运算?要加减乘除都有的,20道,不要太简单也不要太麻烦
谁给我20到有理数混合运算?要加减乘除都有的,20道,不要太简单也不要太麻烦

谁给我20到有理数混合运算?要加减乘除都有的,20道,不要太简单也不要太麻烦
39+[-23]+0+[-16]= 0
[-18]+29+[-52]+60= 19
[-3]+[-2]+[-1]+0+1+2= -3
[-301]+125+301+[-75]= 50
[-1]+[-1/2]+3/4+[-1/4]= -1
[-7/2]+5/6+[-0.5]+4/5+19/6= 1.25
[-26.54]+[-6.14]+18.54+6.14= -8
1.125+[-17/5]+[-1/8]+[-0.6]= -3
[-|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+1/3+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

-2.5+(-1/5) 0.4-(-1/4)+1/6 1/3-(-5/6)+2/3 1/3+(-1/5)+1+2/3
=-2.5-0.2 =13/20+1/6 =7/6+4/6 =2/15+1+10/15
=-2.7 =49/60 =11/6 =9/5
27-18+(-...

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-2.5+(-1/5) 0.4-(-1/4)+1/6 1/3-(-5/6)+2/3 1/3+(-1/5)+1+2/3
=-2.5-0.2 =13/20+1/6 =7/6+4/6 =2/15+1+10/15
=-2.7 =49/60 =11/6 =9/5
27-18+(-7)-32 0.5+(-1/4)-(-2.75)+1/2
=27-18-7-32 =0.5-0.25+2.75+0.5
=-30 =3.51.345x0.345x2.96-1.345（的3次方）-1.345x0.345（的2次方）
=-1.345(1.345^2-2*1.345*0.345+0.345^2)
=-1.345(1.345-0.345)^2
=-1.345
1+（-2）+3+(-4)+......+（-1）（的n+1次方）*n
n为奇数
1+(-2)+3+(-4)+......+[(-1)的n+1次方]n
=[1+(-2)]+[3+(-4)]+....+[(-1)的n+1次方]n
=(-1+ -1+...+ )+n
=(1-n)/2+n
=(n+1)/2
n为偶数
1+(-2)+3+(-4)+5+(-6)+......+[(-1)^（n+1）]n
＝1+(3-2)+(5-4)+(7-6)......+(n-1-（n-2))+（-n）
＝n/2-n2又3/4-（-1.25）-1又3/8
=4-1又3/8
=2又5/8
（-240）×（-5又1/5+7又3/8-2又8/15-1/2）
=-240×（-8又7/30+7又3/8）
=240+56-90
=206
[1又21/24-（3/8+1/16-3/4）×（-64）]÷5
=【1又7/8+5/16×（-64）】÷5
=【15/8-20】÷5
=3/8-4
=3又5/8
-2.5×（-4.8）×（0.09）÷（-0.27）
=-2.5×（-4.8）×（-1/3）
=-2.5×1.6
=-4
（-1）-（1-1/2）÷3×[2-(-3)×（-3）]
=-1-（1/2）÷3×15
=-1-1/6×15
=-1-5/2
=-3又1/2
＝-n/2

收起

(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...

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(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)+11
(14) 8+(-1)/7+(-4)
(15) (-13)-(-9)*16*(-12)
(16) (-1)+4*19+(-2)
(17) (-17)*(-9)-20+(-6)
(18) (-5)/12-(-16)*(-15)
(19) (-3)-13*(-5)*13
(20) 5+(-7)+17-10

收起

(1) (-9)-(-13)+(-20)+(-2)
原式 =（-9）+13+（-20）+（-2）
=【（-9）+（-20）+（-2）】+13
=（-31）+13
=-18

①8-(-4)÷2²×3
=8+4÷4×3
=8+3
=11
②(-3)³÷(-3)÷9
=9÷（-3）÷9
=-1/3
③7×3²÷3+(-3)
=7×9÷3-3
=21-3
=18
④-5+16-16÷(-2)³
=-5+16-16÷（-8）
=11+...

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①8-(-4)÷2²×3
=8+4÷4×3
=8+3
=11
②(-3)³÷(-3)÷9
=9÷（-3）÷9
=-1/3
③7×3²÷3+(-3)
=7×9÷3-3
=21-3
=18
④-5+16-16÷(-2)³
=-5+16-16÷（-8）
=11+2
=13
⑤(-28)÷(-6+4)+(-1)×5
=-28÷（-2）-5
=14-5
=9
⑥2÷(-2)+0÷7-(-8)×(-2)
=-1+0-16
=-17
⑦3×4²+80÷5÷2³-27
=3×16+16÷8-27
=48+2-27
=50-27
=23
⑧12²÷(-3)²×(-2)³-(-9)²÷3³
=144÷9×（-8）-81÷9
=16×（-8）-9
=-128-9
=-137
⑨-5+28÷（-2）×(-14)
=-5-14×（-14）
=-5+196
=191
⑩-2³÷4×(-5)²
=-8÷4×25
=-2×25
=-50
只有这么多了

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