初一数学题~亲们帮忙算一下~
1)23+(-73)
(2)(-84)+(-49)
(3)7+(-2.04)
(4)4.23+(-7.57)
(5)(-7÷3)+(-7÷6)
(6)9÷4+(-3÷2)
(7)3.75+(2.25)+5÷4
(8)-3.75+(+5÷4)+(-1.5)
(9)(+1.3)-(+17÷7)
(10)(-2)-(+2÷3)
(11)|(-7.2)-(-6.3)+(1.1)|
(12)(-4)(+6)(-7)
(13)(-27)(-25)(-3)(-4)
(14)0.001×(-0.1)×(1.1)
(15)24×(-5/4)×(-12/15)×(-0.12)
(16)(-3÷2)(-4÷3)(-5÷4)(-6÷5)(-7÷6)(-8÷7)
(17)(-24÷7)(11÷8+7÷3-3.75)×24
(18)4.6-(-3/4+1.6-4-3/4)
(19)1/2+3+5/6-7/12
(20)[2/3-4-1/4*(-0.4)]/1/3+2
(21)22+(-4)+(-2)+4*3
(22)-2*8-8*1/2+8/1/8
(23)(2/3+1/2)/(-1/12)*(-12)
(24)(-28)/(-6+4)+(-1)
(25)2/(-2)+0/7-(-8)*(-2)
(26)(1/4-5/6+1/3+2/3)/1/2
(27)18-6/(-3)*(-2)
(28)(5+3/8*8/30/(-2)-3
(29)(-84)/2*(-3)/(-6)
(30)2*(-4/15)/2/3
(31)-3x+2y-5x-7y
(32)-5+21*8/2-6-59
(33)68/21-8-11*8+61
(34)-2/9-7/9-56
(35)4.6-(-3/4+1.6-4-3/4)
(36)1/2+3+5/6-7/12
(37)[2/3-4-1/4*(-0.4)]/1/3+2
(38)22+(-4)+(-2)+4*3
(1)3ab-4ab+8ab-7ab+ab
(2)4.7x-(5x-5y)-y
(3)23a3bc2-15ab2c+8abc-24a3bc2-8abc
(4)-7x2+6x+13x2-4x-5x2
(5)2y+(-2y+5)-(3y+2)
(6)(2x2-3xy+4y2)+(x2+2xy-3y2)
(7)2a-(3a-2b+2)+(3a-4b-1)
(8)-6x2-7x2+15x2-2x2
(9)2x-(x+3y)-(-x-y)-(x-y)
(10)2x+2y-[3x-2(x-y)]
(11)5-(1-x)-1-(x-1)
(12)-2(3x+z)-(-6x)+(-5y+3z)
(13)-5an-an+1-(-7an+1)+(-3an)
(14)3a-(2a-4b-6c)+3(-2c+2b)
(15)9a+[7a2-2a-(-a2+3a)]
(16)-3x+2y-5x-7y
(17)-2n-(3n-1)
(18)a-(5a-3b)+(2b-a)
(19)-3(2s-5)+6s
(20)1-(2a-1)-(3a+3)
(21)3(-ab+2a)-(3a-b)
(22)14(abc-2a)+3(6a-2abc)
(23)3(xy-2z)+(-xy+3z)
(24)-4(pq+pr)+(4pq+pr)
(25)x-{y+2x-3(x+y)}
(26)-9(x-2