初一计算题100道及答案(初一计算题及答案)_不等式_计算题_答案

本文目录

  • 初一计算题及答案
  • 100道七年级的数学计算题 要答案
  • 初一的一元一次不等式组的计算题及答案100道
  • 七年级的计算题和答案100道
  • 初一数学下册计算题100道

初一计算题及答案

我这里有很多,你自己去摘抄一些把。。。
1.25×(8+10)
=1.25×8+1.25×10
=10+12.5=22.5
9123-(123+8.8)
=9123-123-8.8
=9000-8.8
=8991.2
1.24×8.3+8.3×1.76
=8.3×(1.24+1.76)
=8.3×3=24.9
9999×1001
=9999×(1000+1)
=9999×1000+9999×1
=10008999
14.8×6.3-6.3×6.5+8.3×3.7
=(14.8-6.5)×6.3+8.3×3.7
=8.3×6.3+8.3×3.7
8.3×(6.3+3.7)
=8.3×10
=83
1.24+0.78+8.76
=(1.24+8.76)+0.78
=10+0.78
=10.78
933-157-43
=933-(157+43)
=933-200
=733
4821-998
=4821-1000+2
=3823
I32×125×25
=4×8×125×25
=(4×25)×(8×125)
=100×1000
=100000
9048÷268
=(2600+2600+2600+1248)÷26
=2600÷26+2600÷26+2600÷26+1248÷269
=100+100+100+48
=348
2881÷ 43
=(1290+1591)÷ 434
=1290÷43+1591÷43
=30+37
3.2×42.3×3.75-12.5×0.423×16
=3.2×42.3×3.75-1.25×42.3×1.6
=42.3×(3.2×3.75-1.25×1.6)
=42.3×(4×0.8×3.75-1.25×4×0.4)
=42.3×(4×0.4×2×3.75-1.25×4×0.4)
=42.3×(4x0.4x7.5-1.25x4x0.4)
=42.3×
=42.3×
=42.3×(4×2.5)
=4237
1.8+18÷1.5-0.5×0.3
=1.8+12-0.15
=13.8-0.15
=13.65
6.5×8+3.5×8-47
=52+28-47
=80-47
(80-9.8)×5分之2-1.32
=70.2X2/5-1.32
=28.08-1.32
=26.76
8×7分之4÷
=8×4/7÷
=8×4/7÷4
=8/7
2700×(506-499)÷900
=2700×7÷900
=18900÷900
=21
33.02-(148.4-90.85)÷2.5
=33.02-57.55÷2.5
=33.02-23.02
=10
(1÷1-1)÷5.1
=(1-1)÷5.1
=0÷5.1
=0
18.1+(3-0.299÷0.23)×1
=18.1+1.7×1
=18.1+1.7
=19.8
+60= 19
+0+1+2= -3
= 50
= -1
+4/5+19/6= 1.25
+18.54+6.14= -8
1.125+= -3
-(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
/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
1437×27+27×563 〔75-(12+18)〕÷15
2160÷〔(83-79)×18〕 280+840÷24×5
325÷13×(266-250) 85×(95-1440÷24)
58870÷(105+20×2) 1437×27+27×563
81432÷(13×52+78) ×30
156× (947-599)+76×64
36×(913-276÷23) ×67
÷2.5 81432÷(13×52+78)
5.4÷
(136+64)×(65-345÷23) (6.8-6.8×0.55)÷8.5
0.12× 4.8÷0.12×4.8 (58+37)÷(64-9×5)
812-700÷(9+31×11) (3.2×1.5+2.5)÷1.6
85+14×(14+208÷26) 120-36×4÷18+35
(284+16)×(512-8208÷18) 9.72×1.6-18.305÷7
4/7÷ (4/5+1/4)÷7/3+7/10
12.78-0÷( 13.4+156.6 ) 37.812-700÷(9+31×11) (136+64)×(65-345÷23) 3.2×(1.5+2.5)÷1.6
85+14×(14+208÷26) (58+37)÷(64-9×5)
(6.8-6.8×0.55)÷8.5 (284+16)×(512-8208÷18)
0.12× 4.8÷0.12×4.8 (3.2×1.5+2.5)÷1.6
120-36×4÷18+35 10.15-10.75×0.4-5.7
5.8×(3.87-0.13)+4.2×3.74 347+45×2-4160÷52
32.52-(6+9.728÷3.2)×2.5 87(58+37)÷(64-9×5)
÷2.5 (3.2×1.5+2.5)÷1.6
5.4÷ 12×6÷(12-7.2)-6
3.2×6+(1.5+2.5)÷1.6 (3.2×1.5+2.5)÷1.6
5.8×(3.87-0.13)+4.2×3.74
33.02-(148.4-90.85)÷2.5
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)(-17/4)+(-10/3)+(+13/3)+(11/3)
(10)(-1.8)+(+0.2)+(-1.7)+(0.1)+(+1.8)+(+1.4)
(11)(+1.3)-(+17/7)
(12)(-2)-(+2/3)
(13)|(-7.2)-(-6.3)+(1.1)|
(14)|(-5/4)-(-3/4)|-|1-5/4-|-3/4|)
(15)(-2/199)*(-7/6-3/2+8/3)
(16)4a)*(-3b)*(5c)*1/6
1. 3/7 × 49/9 - 4/3
2. 8/9 × 15/36 + 1/27
3. 12× 5/6 – 2/9 ×3
4. 8× 5/4 + 1/4
5. 6÷ 3/8 – 3/8 ÷6
6. 4/7 × 5/9 + 3/7 × 5/9
7. 5/2 -( 3/2 + 4/5 )
8. 7/8 + ( 1/8 + 1/9 )
9. 9 × 5/6 + 5/6
10. 3/4 × 8/9 - 1/3
0.12χ+1.8×0.9=7.2 (9-5χ)×0.3=1.02 6.4χ-χ=28+4.4
11. 7 × 5/49 + 3/14
12. 6 ×( 1/2 + 2/3 )
13. 8 × 4/5 + 8 × 11/5
14. 31 × 5/6 – 5/6
15. 9/7 - ( 2/7 – 10/21 )
16. 5/9 × 18 – 14 × 2/7
17. 4/5 × 25/16 + 2/3 × 3/4
18. 14 × 8/7 – 5/6 × 12/15
19. 17/32 – 3/4 × 9/24
20. 3 × 2/9 + 1/3
21. 5/7 × 3/25 + 3/7
22. 3/14 ×× 2/3 + 1/6
23. 1/5 × 2/3 + 5/6
24. 9/22 + 1/11 ÷ 1/2
25. 5/3 × 11/5 + 4/3
26. 45 × 2/3 + 1/3 × 15
27. 7/19 + 12/19 × 5/6
28. 1/4 + 3/4 ÷ 2/3
29. 8/7 × 21/16 + 1/2
30. 101 × 1/5 – 1/5 × 21
31.50+160÷40 (58+370)÷(64-45)
32.120-144÷18+35
33.347+45×2-4160÷52
34(58+37)÷(64-9×5)
35.95÷(64-45)
36.178-145÷5×6+42 420+580-64×21÷28
37.812-700÷(9+31×11) (136+64)×(65-345÷23)
38.85+14×(14+208÷26)
39.(284+16)×(512-8208÷18)
40.120-36×4÷18+35
41.(58+37)÷(64-9×5)
42.(6.8-6.8×0.55)÷8.5
43.0.12× 4.8÷0.12×4.8
44.(3.2×1.5+2.5)÷1.6 (2)3.2×(1.5+2.5)÷1.6
45.6-1.6÷4= 5.38+7.85-5.37=
46.7.2÷0.8-1.2×5= 6-1.19×3-0.43=
47.6.5×(4.8-1.2×4)= 0.68×1.9+0.32×1.9
48.10.15-10.75×0.4-5.7
49.5.8×(3.87-0.13)+4.2×3.74
50.32.52-(6+9.728÷3.2)×2.5
51.-5+58+13+90+78-(-56)+50
52.-7*2-57/(3
53.(-7)*2/(1/3)+79/(3+6/4)
54.123+456+789+98/(-4)
55.369/33-(-54-31/15.5)
56.39+{3x}
57.9x8x7/5x(4+6)
58.11x22/(4+12/2)
59.94+(-60)/10
1.
a^3-2b^3+ab(2a-b)
=a^3+2a^2b-2b^3-ab^2
=a^2(a+2b)-b^2(2b+a)
=(a+2b)(a^2-b^2)
=(a+2b)(a+b)(a-b)
2.
(x^2+y^2)^2-4y(x^2+y^2)+4y^2
=(x^2+y^2-2y)^2
3.
(x^2+2x)^2+3(x^2+2x)+x^2+2x+3
=(x^2+2x)^2+4(x^2+2x)+3
=(x^2+2x+3)(x^2+2x+1)
=(x^2+2x+3)(x+1)^2
4.
(a+1)(a+2)+(2a+1)(a-2)-12
=a^2+3a+2+2a^2-3a-2-12
=3a^2-12
=3(a+2)(a-2)
5.
x^2(y+z)^2-2xy(x-z)(y+z)+y^2(x-z)^2
=^2
=(xz+yz)^2
=z^2(x+y)^2
6.
3(a+2)^2+28(a+2)-20
=
=(3a+4)(a+12)
7.
(a+b)^2-(b-c)^2+a^2-c^2
=(a+b)^2-c^2+a^2-(b-c)^2
=(a+b+c)(a+b-c)+(a+b-c)(a-b+c)
=(a+b-c)(a+b+c+a-b+c)
=2(a+b-c)(a+c)
8.
x(x+1)(x^2+x-1)-2
=(x^2+x)(x^2+x-1)-2
=(x^2+x)^2-(x^2+x)-2
=(x^2+x-2)(x^2+x+1)
=(x+2)(x-1)(x^2+x+1)
1. 3/7 × 49/9 - 4/3
2. 8/9 × 15/36 + 1/27
3. 12× 5/6 – 2/9 ×3
4. 8× 5/4 + 1/4
5. 6÷ 3/8 – 3/8 ÷6
6. 4/7 × 5/9 + 3/7 × 5/9
7. 5/2 -( 3/2 + 4/5 )
8. 7/8 + ( 1/8 + 1/9 )
9. 9 × 5/6 + 5/6
10. 3/4 × 8/9 - 1/3
0.12χ+1.8×0.9=7.2 (9-5χ)×0.3=1.02 6.4χ-χ=28+4.4
11. 7 × 5/49 + 3/14
12. 6 ×( 1/2 + 2/3 )
13. 8 × 4/5 + 8 × 11/5
14. 31 × 5/6 – 5/6
15. 9/7 - ( 2/7 – 10/21 )
16. 5/9 × 18 – 14 × 2/7
17. 4/5 × 25/16 + 2/3 × 3/4
18. 14 × 8/7 – 5/6 × 12/15
19. 17/32 – 3/4 × 9/24
20. 3 × 2/9 + 1/3
21. 5/7 × 3/25 + 3/7
22. 3/14 ×× 2/3 + 1/6
23. 1/5 × 2/3 + 5/6
24. 9/22 + 1/11 ÷ 1/2
25. 5/3 × 11/5 + 4/3
26. 45 × 2/3 + 1/3 × 15
27. 7/19 + 12/19 × 5/6
28. 1/4 + 3/4 ÷ 2/3
29. 8/7 × 21/16 + 1/2
30. 101 × 1/5 – 1/5 × 21
31.50+160÷40 (58+370)÷(64-45)
32.120-144÷18+35
33.347+45×2-4160÷52
34(58+37)÷(64-9×5)
35.95÷(64-45)
36.178-145÷5×6+42 420+580-64×21÷28
37.812-700÷(9+31×11) (136+64)×(65-345÷23)
38.85+14×(14+208÷26)
39.(284+16)×(512-8208÷18)
40.120-36×4÷18+35
41.(58+37)÷(64-9×5)
42.(6.8-6.8×0.55)÷8.5
43.0.12× 4.8÷0.12×4.8
44.(3.2×1.5+2.5)÷1.6 (2)3.2×(1.5+2.5)÷1.6
45.6-1.6÷4= 5.38+7.85-5.37=
46.7.2÷0.8-1.2×5= 6-1.19×3-0.43=
47.6.5×(4.8-1.2×4)= 0.68×1.9+0.32×1.9
48.10.15-10.75×0.4-5.7
49.5.8×(3.87-0.13)+4.2×3.74
50.32.52-(6+9.728÷3.2)×2.5
51.-5+58+13+90+78-(-56)+50
52.-7*2-57/(3
53.(-7)*2/(1/3)+79/(3+6/4)
54.123+456+789+98/(-4)
55.369/33-(-54-31/15.5)
56.39+{3x}
57.9x8x7/5x(4+6)
58.11x22/(4+12/2)
59.94+(-60)/10
1.
a^3-2b^3+ab(2a-b)
=a^3+2a^2b-2b^3-ab^2
=a^2(a+2b)-b^2(2b+a)
=(a+2b)(a^2-b^2)
=(a+2b)(a+b)(a-b)
2.
(x^2+y^2)^2-4y(x^2+y^2)+4y^2
=(x^2+y^2-2y)^2
3.
(x^2+2x)^2+3(x^2+2x)+x^2+2x+3
=(x^2+2x)^2+4(x^2+2x)+3
=(x^2+2x+3)(x^2+2x+1)
=(x^2+2x+3)(x+1)^2
4.
(a+1)(a+2)+(2a+1)(a-2)-12
=a^2+3a+2+2a^2-3a-2-12
=3a^2-12
=3(a+2)(a-2)
5.
x^2(y+z)^2-2xy(x-z)(y+z)+y^2(x-z)^2
=^2
=(xz+yz)^2
=z^2(x+y)^2
6.
3(a+2)^2+28(a+2)-20
=
=(3a+4)(a+12)
7.
(a+b)^2-(b-c)^2+a^2-c^2
=(a+b)^2-c^2+a^2-(b-c)^2
=(a+b+c)(a+b-c)+(a+b-c)(a-b+c)
=(a+b-c)(a+b+c+a-b+c)
=2(a+b-c)(a+c)
8.
x(x+1)(x^2+x-1)-2
=(x^2+x)(x^2+x-1)-2
=(x^2+x)^2-(x^2+x)-2
=(x^2+x-2)(x^2+x+1)
=(x+2)(x-1)(x^2+x+1)
这样可以么?

100道七年级的数学计算题 要答案

(1):(-8)-(-15)+(-9)-(-12)
=-8+15-9+12
=10
(2):(-40)+29-(-15)-|-24|
=-21+15-24
=-30
(3):(2/3)-(1/8)-(-1/3)+(-3/8)
=(2/3)-(-1/3)-((1/8)-(3/8))
=1+(1/4)
=5/4
(4):0.5+(-1/4)-(-2.75)+(1/2)
=0.5+(1/2)+((-1/4)+2.75)
=1+2.5
=3.5
(5):(-2/5)+(-5/6)-(-4.5)-0.6
=(-2/5)-0.6-5/6+4.5
=-1+(16/6)
=16/6
(6):(-2/3)+(-1/6)-(-1/4)-(1/2)
=(-2/3)-(1/6)+(1/4)-(1/2)
=-13/12
(7):(-3/3)乘(-1/2)*(-8/15)
=-1*(-1/2)*(-8/15)
=-4/15
(8):(-0.1)除以(1/2)*(1000)
=-0.2*1000
=-200
(9):(-18)除以2.25乘4/9除以(-16)
=-8*(4/9)/(-16)
=-(32/9)/(-16)
=2/9
(10):乘|-36|
=36-17+21
=40
(11):(504/11)除以9
=(504/11)*(1/9)
=56/11
(12):(-5)乘(-27/7)+(-7)乘(-27/7)+12乘(-27/7)
=((-5)+(-7)+12))*(-27/7)
=0*(-27/7)
=0 答案肯定对
这样的问题可以到百度文库中去找,很方便的

初一的一元一次不等式组的计算题及答案100道

如图:

由几个含有同一个未知数的一元一次不等式组成的不等式组,叫做一元一次不等式组(System of Linear Inequalities in One Variable)。不等式组中所有不等式的解集的公共部分叫做这个不等式组的解集。求不等式组的解集的过程叫做解不等式组。

由一元一次不等式组的定义可知一个一元一次不等式组的几个不等式必须符合三个条件:(1)这里的几个可以是两个、三个、…;(2)每个不等式都是一元一次不等式;(3)必须都含有同一个未知数。

步骤:

(1)解不等式组:求不等式组解集的过程叫做解不等式组。

(2)解一元一次不等式组的一般步骤:

第一步:分别求出不等式组中各不等式的解集。

第二步:将各不等式的解集在数轴上表示出来。

第三步:在数轴上找出各不等式的解集的公共部分,这个公共部分就是不等式组的解集。

七年级的计算题和答案100道

计算:-9÷27/4×(-7)+4-4×(+4/3)
解:原式= 9×4/27×7+4-4×4/3
=4/3×7-4×4/3+4
=(7-4)×4/3+4
=4+4
=8
22/7×(22/7-22/3)×7/22÷22/21
解:原式=22/7×(22/7-22/3)×7/22×21/22
=22/7×7/22×(22/7-22/3)×21/22
=22/7×21/22-22/3×21/22
=3-7
=-4
(-1)^2011÷1/15+(-1/5)×(-5)^3
解:原式=(-1)÷1/15+(-1/5)×(-125)
=(-1)×15+1/5×125
= -15+25
=10
-12^56×
解:原式=-12^56×
=-12^56×
=-12^56×(-1+1)
=0
1、3ab-5ab2+3a2b-4ab+2ab2-3ab
解:原式=(3ab-3ab)-4ab+(-5ab2+2ab2)+3a2b
=-4ab+(-5+2)ab2+3a2b
=-4ab+(-3)ab2+3a2b
=-4ab-3ab2+3a2b
2、2(2x-y)-3(2x-y)2+2x-y-5(2x-y)2
解:原式=2(2x-y)-3(2x-y)2+(2x-y)-5(2x-y)2
=
=(2+1)(2x-y)+(-3-5)(2x-y)2
=3(2x-y)-8(2x-y)2
1、化简
(1) (2a+b)-(a-2b)
解:原式=2a+b-a+2b
=2a-a+b+2b
=(2-1)a+(1+2)b
=a+3b
(2) -3(a-2b)-2(2a-b)
解:原式=-3a+(-3)(-2b)+(-2)(2a)+(-2)(-b)
=-3a+6b-4a+2b
=(-3-4)a+(6+2)b
=-7a+8b
(3) -1/4(-4a+4b/3)-1/3(3a-2b)
解:原式=--(1/3•3a-1/3•2b)
=-(-a+b/3)-(a-2b/3)
=a-b/3-a+2b/3
=(a-a)+(-1/3+2/3)b
=b/3
(4) 3x2y-2-3xyz
解:原式=3x2y-2-3xyz
=3x2y-2(3x2y-9xyz-6x2z+x2z)-3xyz
=3x2y-2-3xyz
=3x2y-2(3x2y-9xyz-5x2z)-3xyz
=3x2y-(6x2y-18xyz-10x2z)-3xyz
=3x2y-6x2y+18xyz+10x2z-3xyz
=-3 x2y+15xyz+10x2z
2、若A=3x2y+4xy2,B=2xy2-x2y,求-2A-3B
解:-2A-3B=-2(3x2y+4xy2)-3(2xy2-x2y)
=-(6x2y+8xy2)-(6xy2-3x2y)
=-6x2y-8xy2-6xy2+3x2y
=(-6x2y+3x2y)+(-8xy2-6xy2)
=-3x2y-14xy2
3、先化简再求值:若|x+1|+(y-1/3)2=0,求8xy-2{xy+3-2x4y}的值
解:化简:原式=8xy-2{xy+3-2x4y}
=8xy-2
=8xy-2
=8xy-2(xy+3x4y+3xy-2x4y)
=8xy-2(4xy+x4y)
=8xy-8xy-2x4y
=-2x4y
由|x+1|+(y-1/3)2=0,得
x=-1,y=1/3
将x=-1,y=1/3代入-2x4y,得
-2×(-1)4×1/3=-2/3
所以,原式=-2/3
4、有一道题:求两个多项式的差。小刚错把2a2b-3ab2当作被减数,解得差为-a2b,求正确的差。
解:设A=2a2b-3ab2,C=-a2b,另外一个多项式为B
小刚列的式子为:A-B=C,所以B=A-C
B=(2a2b-3ab2)-(-a2b)
=2a2b-3ab2+a2b
=3a2b-3ab2
正确的差应为:
B-A=(3a2b-3ab2)-(2a2b-3ab2)
=3a2b-3ab2-2a2b+3ab2
= a2b
(别解:因为a-b与b-a是相反数,小刚将被减数和减数搞反了,所以得到的差是正确的差的相反数,因此,正确的差为-(-a2b)= a2b)

初一数学下册计算题100道

(4+8)x125
=4x125+8x125
=500+1000
=1500

58x101-58
=58x(101-1)
=58x100
=5800

5600÷(56x25)
=5600÷56÷25
=100÷25
=4

269x5+269x99-4x269
=269x(5+99-4)
=269x100
=26900

147x19+81x147
=147x(19+81)
=147x100
=14700

(25+125)x80
=25x80+125x80
=2000+10000
=12000

120÷(3分之1-4分之1)
=120÷(12分之4-12分之3)
=120÷12分之1
=120×12
=1440

10.1×89-8.9
=101x8.9-8.9x1
=8.9x(101-1)
=8.9x100
=890

9.07-22.78÷3.4
=9.07-6.7
=9.07-(7-0.3)
=9.07-7+0.3
=2.07+0.3
=2.37

5+7×(8+12)÷(4-2)
=5+7×20÷2
=5+70
=75

16x4+16x6x16
=16x4+96x16
=16x(4+96)
=16x100
=1600

7/25×4/9+7/25×5/9
=7/25×(4/9+5/9)
=7/25×1
=7/25

60×(1/12+1/15+1/4)
=60×1/12+60×1/15+60×1/4
=5+4+15
=24

(5/12-3/8)×72
=5/12×72-3/8×72
=30-27
=3

6/7-5/24÷7/12
=6/7-5/24×12/7
=12/14-5/14
=7/14
=1/2

÷9/13
=3/4×(7/16-4/16)×13/9
=1/4×3/16×13/3
=13/64

2/3-7/8+1/3
=(2/3+1/3)-7/8
=1-7/8
=1/8

5/6-(3/7-1/6)
=(5/6+1/6)-3/7
=1-3/7
=4/7

1-1/3-2/3
=1-(1/3+2/3)
=1-1
=0

1+3/5-1/10
=1+6/10-1/10
=1+1/2
=1又1/2

3/8-12/13+5/8
=3/8+5/8-12/13
=1-12/13
=1/13

1-(1/2-3/4)
=1+3/4-2/4
=1+1/4
=5/4

1-1/2-1/4
=1/2-1/4
=2/4-1/4
=1/4

2/7-8/9+5/7
=(2/7+5/7)-8/9
=1-8/9
=1/9

2-1/4-3/4
=2-(1/4+3/4)
=2-1
=1

1/2-(3/8-1/2)
=1/2+1/2-3/4
=1-3/8
=5/8

2.64×1.7-2.64×0.7
=2.64×(1.7-0.7)
=2.64×1
=2.64

31.5×1.07-3.15×0.7
=3.15×10.7-3.15×0.7
=3.15×(10.7-0.7)
=3.15×10
=31.5

2.7×5.7-2.7+5.3×2.7
=2.7×(5.7-1+5.3)
=2.7×10
=27

0.625÷0.125×0.8
=(0.625×0.8)×8÷(0.125×8)
=0.5×8÷1
=4

18.6×6.1+3.9×18.6
=18.6×(6.1+3.9)
=18.6×10
=186

52.5x2.9+5.45
=5.25x29+5.25+0.2
=5.25×(29+1)+0.2
=5.25×30+0.2
=157.5+0.3
=157.7

0.92x15+0.08x15
=(0.92+0.08)×15
=1×15
=15

0.72×1.25×2.5
=0.9×(0.8×1.25)×2.5
=0.9×1×2.5
=2.25

400.6x7-2003x0.4
=200.3x14-200.3x4
=200.3×(14-4)
=200.3×10
=2003

300÷125÷8
=300÷(125×8)
=300÷1000
=0.3

396-96-172-28
=(396-96)-(172+28)
=300-200
=100

125x24
=125x8x3
=1000x3
=3000

26x15
=(20+6)x15
=20x15+6x15
=300+90
=390

25x99x4
=25x4x99
=100x99
=9900

250x32
=250x4x8
=1000x8
=8000

(98+98+98+98)x25
=4x98x25
=4x25x98
=100x98
=9800

3/4÷5/8×3/10
=3/4×8/5×3/10
=9/5×1/5
=9/25

1.25×(8+10)
=1.25×8+1.25×10
=10+12.5
=22.5

1.24+0.78+8.76
=(1.24+8.76)+0.78
=10+0.78
=10.78

1/2-(4/5-1/2)
=1/2+1/2-4/5
=1-4/5
=1/5

4800÷25÷4
=4800÷(25x4)
=4800÷100
=4800÷100
=48

2/5-(3/8-3/5)
=2/5+3/5-3/8
=1-3/8
=5/8

3/4-(3/7-1/4)
=3/4+1/4-3/7
=1-3/7
=4/7

3.2x0.125x2.5
=0.125x8x(0.4x2.5)
=1x1
=1

0.4×125×25×0.8
=(0.4×25)×(125×0.8)
=10×100
=1000

1.25×(8+10)
=1.25×8+1.25×10
=10+12.5
=22.5

9123-(123+8.8)
=9123-123-8.8
=9000-8.8
=8991.2

1.24×8.3+8.3×1.76
=8.3×(1.24+1.76)
=8.3×3
=24.9

9999×1001
=9999×(1000+1)
=9999×1000+9999×1
=10008999

14.8×6.3-6.3×6.5+8.3×3.7
=(14.8-6.5)×6.3+8.3×3.7
=8.3×6.3+8.3×3.7
=8.3×(6.3+3.7)
=8.3×10
=83

1.24+0.78+8.76
=(1.24+8.76)+0.78
=10+0.78
=10.78

933-157-43
=933-(157+43)
=933-200
=733

4821-998
=4821-1000+2
=3823

32×125×25
=4×8×125×25
=(4×25)×(8×125)
=100×1000
=100000

1.8+18÷1.5-0.5×0.3
=1.8+12-0.15
=13.8-0.15
=13.65

6.5×8+3.5×8-47
=52+28-47
=80-47

3.7x2.56-2.3
=9.472-2.3
=7.172

1.24+0.78+8.76
=(1.24+8.76)+0.78
=10+0.78
=10.78

1/2-(4/5-1/2)
=1/2+1/2-4/5
=1-4/5
=1/5

4800÷25÷4
=4800÷(25x4)
=4800÷100
=4800÷100
=48

2/5-(3/8-3/5)
=2/5+3/5-3/8
=1-3/8
=5/8

3/4-(3/7-1/4)
=3/4+1/4-3/7
=1-3/7
=4/7

3.2x0.125x2.5
=0.125x8x(0.4x2.5)
=1x1
=1

0.4×125×25×0.8
=(0.4×25)×(125×0.8)
=10×100
=1000

1.25×(8+10)
=1.25×8+1.25×10
=10+12.5
=22.5

9123-(123+8.8)
=9123-123-8.8
=9000-8.8
=8991.2

1.24×8.3+8.3×1.76
=8.3×(1.24+1.76)
=8.3×3
=24.9

9999×1001
=9999×(1000+1)
=9999×1000+9999×1
=10008999

14.8×6.3-6.3×6.5+8.3×3.7
=(14.8-6.5)×6.3+8.3×3.7
=8.3×6.3+8.3×3.7
=8.3×(6.3+3.7)
=8.3×10
=83

1.24+0.78+8.76
=(1.24+8.76)+0.78
=10+0.78
=10.78

933-157-43
=933-(157+43)
=933-200
=733

4821-998
=4821-1000+2
=3823

32×125×25
=4×8×125×25
=(4×25)×(8×125)
=100×1000
=100000

9/17x8/13-13/17/8
=9/17x8/13-13/17x1/8
=72/221-13/136
=576/1768-169/1768
=407/1768

9/17x8/13+8/13/(17/8)
=9/17x8/13+8/13x8/17
=8/13x(9/17+8/17)
=8/13x1
=8/13

10.1×89-8.9
=10.1x89-89x0.1
=89x(10.1-0.1)
=89x10
=890

4x+8=4
解:4x=4-8
4x=-4
x=-4÷4
x=-1

12x+8x-12=28
解:20x=28+12
20x=40
x=40÷20
x=2

4x+2.1=8.5
解:4x=8.5-2.1
4x=6.4
x=6.4÷4
x=1.6

65y-30=100
解:65y=100+30
65y=130
y=130÷65
y=2

15x-7.5x=15
解:7.5x=15
x=15÷7.5
x=2

25%x=5
解:1/4x=5
x=5*4
x=20

20-15%x=17
解:0.15x=20-17
0.15x=3
x=3÷0.15
x=20

25%x=5
解:0.25x=5
x=5÷0.25
x=20

80%X=6/15X+96
解:4/5X=2/5X+96
4/5X-2/5X=96
2/5X=96
X=96*5/2
X=48*5
X=240

15%X+10-X=10*32%
解:0.15X-X=3.2-10
-0.85X=-6.8
X=-6.8÷(-0.85)
X=8

15%X+10-X=10*32%
解:0.15X+10-X=3.2
X-0.15X=10-3.2
0.85X=6.8
X=6.8÷0.85
X=8

8÷x=0.4
解:8÷x*x=0.4*x
0.4x=8
0.4x÷0.4=8÷0.4
x=20

5x+8x=4.7
解:13x=4.7
x=4.7/13
x=47/130

2*20x=10(60-x)
解:40x=600-10x
40x+10x=600
50x=600
x=600÷50
x=12

x÷75+x÷60=36
解:1/75x+1/60x=36
4/300x+5/300x=36
9/300x=36
x=36*300/9
x=12*100
x=1200

x-0.7x=16
解:(1-0.7)x=16
0.3x=16
x=16÷0.3
x=16/0.3
x=160/3

8(x-4)+5=45
解:8(x-4)=45-5
8(x-4)=40
x-4=40÷8
x-4=5
x=5+4
x=9

(x+10)*2.4+4=x+25+10
解:2.4x+24+4=x+35
2.4x+28=x+35
2.4x-x=35-28
1.4x=7
x=7÷1.4
x=5

4x+8=4
解:4x+8-8=4-8——等式性质
4x=-4
4x÷4=-4÷4
x=-1

7.8x-14=40
解:7.8x=40+14
7.8x=54
x=54/7.8
x=540/78
x=90/13

5x+30=6x-10
解:6x-5x=30+10
x=40

4x+8=4——方程两边除以4
解:x+2=1
x=1-2
x=-1

x:6.5=6:4
解:4x=6.5*6
4x=39
x=39/4
x=9.75

8.6x+3*6=52.4
解:8.6x+18=52.4
8.6x=52.4-18
8.6x=34.4
x=34.4÷8.6
x=4

x/5.2-1.6=1.8
解:x/5.2=1.8+1.6
x/5.2=3.4
x=3.4*5.2
x=17.68

225x=239.2x
解:239.2x-225x=0
14.2x=0
x=0÷14.2
x=0

80x+(80-20)(x+10)=4800
解:80x+60(x+10)=4800
80x+60x+600=4800
140x=4800-600
140x=4200
x=4200÷140
x=30

1.5x-0.6*15=18
解:1.5x-9=18
1.5x=18+9
1.5x=27
x=27÷1.5
x=18

6x+4(2x-1)+3(45-3x)=171
解:6x+8x-4+135-9x=171
6x+8x-9x+131=171
5x=171-131
5x=40
x=40÷5
x=8

9x*2+18*6x+17*2x=12.8
解:(18+108+34)x=12.8
160x=12.8
x=12.8÷160
x=0.08

1-4*
解:x(x+5)-=x(x-4)
x²+5x-(4x+20+4x)=x²-4x
x²+5x-8x-20=x²-4x
x²-x²-3x+4x-20=0
4x-3x=20
x=20

2x*(x-1)-x*(2x+3)=15
解:2x²-2x-2x²-3x=15
-5x=15
x=15÷(-5)
x=-3

2分之x+5分之1=3分之1x
解:2分之1x-3分之1x=-5分之1
6分之3x-6分之2x=-5分之1
6分之1x=-5分之1
x=-5分之1*6
x=-5分之6
x=-1又5分之1

8(3x+3)=72
解:3x+3=72÷8
3x+3=9
3x=9-3
3x=6
x=6÷3
x=2

8(3x+3)=72
解:24*(x+1)=72
x+1=72÷24
x+1=3
x=3-1
x=2

8(3x+3)=72
解:24x+24=72
24x=72-24
24x=48
x=48÷24
x=2

4(y+2)=24
解:y+2=24÷4
y+2=6
y=6-2
y=4

4(y+2)=24
解:4y+8=24
4y=24-8
4y=16
y=16÷4
y=4

3x+12.4=5x-3.6
解:5x-3x=12.4+3.6
2x=16
x=16÷2
x=8

x-80%x-6=16
解:x-0.8x=16+6
0.2x=22
x=22÷0.2
x=110

x-0.1x=55.404
解:(1-0.1)x=55.404
0.9x=55.404
x=55.404÷0.9
x=61.56

x+12−1/4x=1
解:x-1/4x=1-12
3/4x=-11
x=-11*4/3
x=-44/3

9分之8÷(2x)=8分之5
解:8分之5*2x=9分之8
4分之5x=9分之8
x=9分之8*5分之4
x=45分之32

5x+30=6x-10
解:6x-5x=30+10
x=40

22%x=34
解:11/50x=34
x=34*50/11
x=1700/11

7分之2x:3分之2=6
解:7分之2x=6*3分之2
7分之2x=4
x=4*2分之7
x=14

0.5x+3分之1x=9分之5
解:2分之1x+3分之1x=9分之5
6分之3x+6分之2x=9分之5
6分之5x=9分之5
x=9分之5*5分之6
x=3分之2

2x-20%×10=4.22
解:2x-2=4.22
2x=4.22+2
2x=6.22
x=6.22÷2
x=3.11

(1-65%)*X=8
解:(1-0.65)X=8
0.35X=8
X=8÷0.35
X=800/35
X=160/7

3分之2X=9分之4
解:X=9分之4*2分之3
X=3分之2

3分之2X+4分之1=12
解:3分之2X=4分之48-4分之1
3分之2X=4分之47
X=4分之47*2分之3
X=8分之141

3X-7分之5X=7分之2
解:7分之21X-7分之5X=7分之2
7分之16X=7分之2
X=7分之2*16分之7
X=8分之1

3X+5=5X-1
解:5X-3X=5+1
2X=6
X=6÷2
X=3

4x-1.5x=5
解:2.5x=5
x=5÷2.5
x=2

X+3.6=2.5X-3.6
解:2.5X-X=3.6+3.6
1.5X=7.2
X=7.2÷1.5
X=4.8

x+3.6=2.5x-3.6
解:2.5x-x=3.6+3.6
1.5x=7.2
x=7.2÷1.5
x=4.8

x-470.25=182
解:x=182+470.25
x=652.25

x÷4=6.34
解:x=6.34*4
x=25.36

8(x+2.4)=83.2
解:x+2.4=83.2÷8
x+2.4=10.4
x=10.4-2.4
x=8

7分之2x=21分之8
解:x=21分之8*2分之7
x=3分之4
x=1又3分之1

9分之8÷2x=8分之5
解:9分之8*2分之1x=8分之5
9分之4x=8分之5
x=8分之5*4分之9
x=32分之45

3.2+2x=9.8
解:1.6+x=4.9
x=4.9-1.6
x=3.3

1/3x-1/4x=12
解:4/12x-3/12x=12
1/12x=12
x=12*12
x=144

1/6x+2/3x=20
解:1/6x4/6x=20
5/6x=20
x=20*6/5
x=4*6
x=24

1/2x+1/3x=5/6
解:(1/2x+1/3x)×6=5/6×6
3x+2x=5
5x=5
x=5÷5
x=1

2x/3+5x/7=23/42
解:(2x/3+5x/7)×42=23/42×42
28x+30x=23
58x=23
x=23/58

5/6-x=1/4
解:x=5/6-1/4
x=10/12-3/12
x=7/12

x÷4/5=2/7
解:x=2/7×4/5
x=8/35

19/8-1/7x=1/8
解:1/7x=9/4
x=63/4
x=15又3/4

14+5x=42
解:5x=42-14
5x=28
x=28/5
x=5.6

7×5+65x=100
解:35+65x=100
65x=100-35
x=65/65
x=1

4x-8*7=28
解:4x=28+56
x=84/4
x=21

8x-x+18=67
解:7x+18=67
7x=67-18
7x=49
x=49÷7
x=7

x+15=200
解:x=200-15
x=185

x/2+x/3=5/6
解:(x/2+x/3)×6=5/6×6
3x+2x=5
5x=5
x=5÷5
x=1

2x/3+5x/7=23/42
解:(2x/3+5x/7)×42=23/42×42
28x+30x=23
58x=23
x=23/58

5*8+2X=60
解:40+2X=60
2X=60-40
X=20÷2
X=10

5(8+2X)=60
解:8+2X=60÷5
8+2X=12
2X=12-8
X=4÷2
X=2

5(8+2X)=60
解:8+2X=60÷5
8/2+2X/2=12/2
4+X=6
X=6-4
X=2

X-5%X=12.6
解:0.95X=12.6
X=12.6/0.95
X=1260/95
X=252/19

5分之3÷5分之6-3X=5分之1
解:3X=5分之3*6分之5-5分之1
3X=2分之1-5分之1
3X=10分之5-10分之2
3X=10分之3
X=10分之3*3分之1
X=10分之1

(X+5分之3)*50%=4
解:X+5分之3=4÷0.5
X=8-5分之3
X=7又5分之2

5分之4X-4=60
解:5分之4X=60+4
X=64*4分之5
X=16*5
X=80

1÷(X-3分之2X)=5分之4
解:5分之4*3分之1X=1
15分之4X=1
X=1*4分之15
X=4分之15

3.2+2x=9.8
解:2x=9.8-3.2
2x=6.6
x=6.6÷2
x=3.3

(8+x)*3=60
解:8+x=60÷3
8+x=20
x=20-8
x=12

(8+x)*3=60
解:24+3x=60
3x=60-24
3x=36
x=36÷3
x=12

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