初一道数学计算题及答案.docx
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初一道数学计算题及答案.docx
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初一道数学计算题及答案
集团文件发布号:
(9816-UATWW-MWUB-WUNN-INNUL-DQQTY-19882)
初一道数学计算题及答案
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?
?
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×
=42.3×[4×0.4×(7.5-1.25)]
=42.3×[4×0.4×6.25]?
=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÷[1÷(3.2-2.95)]
=8×4/7÷[1÷0.25]
=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
[-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÷(13×52+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-(3.41.25×2.4)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)÷8.5?
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÷[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)×(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+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)÷(64-9×5)?
[(7.1-5.6)×0.9-1.15]÷2.5(3.2×1.5+2.5)÷1.6?
5.4÷[2.6×(3.7-2.9)+0.62]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=1.026.4χ-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+1/3×15?
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+42420+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?
×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?
×0.4-5.7?
49.5.8×(3.87-0.13)+4.2×3.74?
(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[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?
6.?
3(a+2)^2+28(a+2)-20?
=[3(a+2)-2][(a+2)+10]?
=(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=1.026.4χ-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+1/3×15?
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+42420+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?
×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?
×0.4-5.7?
49.5.8×(3.87-0.13)+4.2×3.74?
(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[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?
6.?
3(a+2)^2+28(a+2)-20?
=[3(a+2)-2][(a+2)+10]?
=(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)
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