问题标题:
【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)(-】
问题描述:

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

陈洪祥回答:
  1.-50   2.-133   3.4.96   4.-3.34   5.-10/3   6.0.75   7.7.75   8.4   9.-79/70   10.-8/3   .
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