初一数学计算题与答案docWord文档下载推荐.docx
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25
=4×
8×
=(4×
25)×
(8×
125)
=100×
1000
=100000
9048÷
268
=(2600+2600+2600+1248)÷
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×
3.75-1.25×
1.6
=42.3×
(3.2×
1.6)
(4×
0.8×
4×
0.4)
0.4×
2×
(4x0.4x7.5-1.25x4x0.4)
[4×
(7.5-1.25)]
6.25]
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
7分之4÷
[1÷
(3.2-2.95)]
=8×
4/7÷
0.25]
4
=8/7
2700×
(506-499)÷
900
=2700×
7÷
=18900÷
=21
33.02-(148.4-90.85)÷
2.5
=33.02-57.55÷
=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
[-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
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)[37.85-(7.85+6.4)]×
30
156×
[(17.7-7.2)÷
3](947-599)+76×
64
36×
(913-276÷
23)[192-(54+38)]×
67
[(7.1-5.6)×
0.9-1.15]÷
2.581432÷
52+78)
5.4÷
[2.6×
(3.7-2.9)+0.62](947-599)+76×
6460-(9.5+28.9)]
÷
0.182.881÷
0.43-0.24×
3.520×
[(2.44-1.8)÷
0.4+0.15]28-(3.4
2.4)0.8×
〔15.5-(3.215.79)〕(31.83.2×
4)÷
5194-64.8÷
1.8×
0.936.72÷
4.25×
9.93.416÷
(0.016×
35)0.8×
[(10-6.76)÷
1.2]
(136+64)×
(65-345÷
23)(6.8-6.8×
0.55)÷
8.50.12×
4.8÷
0.12×
4.8(58+37)÷
(64-9×
5)
812-700÷
(9+31×
11)(3.2×
1.5+2.5)÷
85+14×
(14+208÷
26)120-36×
4÷
18+35
(284+16)×
(512-8208÷
18)9.72×
1.6-18.305÷
7
4/7
[1/3
×
(3/5-3/10
)]
(4/5+1/4
)÷
7/3+7/10
12.78-0÷
(
13.4+156.6
)
37.812-700
(9+31
11)(136+64
23)3.2×
(1.5+2.5)÷
26)(58+37)÷
(6.8-6.8×
8.5(284+16)×
18)
4.8(3.2×
120-36×
18+3510.15-10.75
0.4-5.7
5.8
(3.87-0.13)+4.2×
3.74347+45×
2-4160÷
52
32.52-(6+9.728÷
3.2)×
2.587
(58+37)÷
2.5(3.2×
5.4
(3.7-2.9)+0.62]12
6÷
(12-7.2)-6
6+(1.5+2.5)÷
1.6(3.2×
5.8×
3.74
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.
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=1.026.4χ-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×
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÷
33.347+45×
34(58+37)÷
35.95÷
36.178-145
5×
6+42420+580-64×
21÷
28
11)(136+64)×
23)
38.85+14×
26)
39.(284+16)×
18)
40.120-36×
41.(58+37)÷
42.(6.8-6.8×
8.5
43.0.12×
4.8
44.(3.2×
1.6
(2)3.2×
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×
49.5.8×
50.32.52-(6+9.728÷
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[42/2x(3x8)]}
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
=[x(y+z)-y(x-z)]^2
=(xz+yz)^2
=z^2(x+y)^2
3(a+2)^2+28(a+2)-20
=[3(a+2)-2][(a+2)+10]
=(3a+4)(a+12)
(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)
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)
6÷
16.5/9×
24.9/22+1/11÷
25.5/3×
45×
53.(-7)*2/(1/3)+79/(3+6/4)