完整版初一100道数学计算题及答案.docx
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完整版初一100道数学计算题及答案
1.25×(8+10)108+1.25=1.25××=10+12.5=22.5
123+8.89123-()=9123-123-8.8
=9000-8.8
=8991.2
1.761.24××8.3+8.31.24+1.76)×(=8.33=24.9=8.3×10019999×=9999×(1000+1)1=9999×1000+9999×=10008999
3.7+8.3×6.3-6.314.8××6.53.7×6.3=(14.8-6.5)×+8.33.76.3+8.3=8.3×××(6.3+)3.78.310=8.3×=83
1.24+0.78+8.76
+0.78
)1.24+8.76(=
=10+0.78
=10.78
933-157-43
(157+43)=933-=933-200
=733
4821-998
=4821-1000+2
=3823
25I32×125×258××125×=4125)84=(×25)×(×1000=100×=100000
268
9048÷26
2600+2600+2600+1248)÷=(26926+124826+2600=2600÷÷26+2600÷÷=100+100+100+48
=348
43
2881÷434)÷1290+1591(=43
÷43+1591÷=1290.
=30+37
1642.33.2××3.75-12.5×0.423×1.642.3×42.3×3.75-1.25×=3.2×1.6)×(3.2××3.75-1.25=42.30.4)4×3.75-1.25(4=42.3××0.8××0.4)2(4=42.3××0.4××3.75-1.25××4(4x0.4x7.5-1.25x4x0.4)=42.3×(7.5-1.25)]×0.4=42.3×[4×6.25]×0.4×[4=42.3×2.5)×(4=42.3×=4237
0.31.5-0.51.8+18÷×=1.8+12-0.15
=13.8-0.15
=13.65
8-47×8+3.5×6.5=52+28-47
=80-47
2-1.325(80-9.8)×分之=70.2X2/5-1.32
=28.08-1.32
=26.76
(3.2-2.95)]÷÷7分之4[1×80.25]÷×4/7÷[1=84÷=8×4/7=8/7
900-506499)÷2700×(900×7÷=2700900=18900÷=21
2.590.85)÷-33.02-(148.42.557.55÷=33.02-23.02=33.02-=10
5.1)÷1(1÷-15.11=(-1)÷5.1=0÷=0
1-)×0.299÷0.23318.1+(1×1.7=18.1+1.7=18.1+=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
151437×27+27×563〔75-(〕÷12+18)52160÷〔(83-79)×18〕280+840×÷2424)325÷13×(266-250)85×(95-1440÷56358870÷(105+20×2)1437×27+27×3081432÷(13×52+78)[37.85-(7.85+6.4)]×64×156[(17.7-7.2)÷3](947-599)+76×67-36×(913276÷23)[192-(54+38)]×78)
)×[(7.1-5.60.9-1.15]÷2.581432÷(13×52+0.43599)+76×6460-(9.5+28.9)]0.182.881÷÷3.7-2.95.4÷[2.6×()+0.62](947-〕×〔15.5-(3.215.79)0.15]28-(3.41.25×2.4)0.8+3.5-0.24×20×[(2.44-1.8)÷0.4[(100.8×0.016(×35)×4(31.83.2×)÷5194-64.8÷1.80.936.72÷4.25×9.93.416÷1.2]
÷-6.76)8.50.55)×÷23)(6.8-6.8)×((136+6465-345÷5)58+37)÷(64-9×÷0.12×4.80.12×4.8(1.61.5+2.5)÷(3.2××812-700÷(9+3111)
18+35
÷120-36×4)85+14×(14+208÷26
7÷×1.6-18.3059.72(284+16)×(512-8208÷18)
7/3+7/10
(4/5+1/4)÷[1/34/7÷×(3/5-3/10)]
2365-345÷)136+641137.812-700156.6)÷(9+31×)()×(+012.78-÷(13.41.6
)÷×(1.5+2.53.2)5×64-9)÷(58+37()26÷14+208×(85+14.
512-8208)÷18(×(6.8-6.80.55)÷8.5284+16)×(1.6)÷1.5+2.54.84.8×÷0.12×(3.2×0.120.4-5.7
×18+3510.15-10.75120-36×4÷52+4.23.87-0.13)×3.74347+45×2-4160÷5.8×(564-9×)58+373.232.52-(6+9.728÷)×2.587()÷(1.6)÷3.20.9-1.15][(7.1-5.6)×÷2.5(×1.5+2.5-6[2.65.4÷×(3.7-2.9))12-7.2+0.62]12×6÷(1.6)÷3.21.61.5+2.5×6+()÷(×1.5+2.53.23.74×(×3.87-0.13)+4.25.82.590.85148.433.02-(-)÷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
49/9-4/31.3/7×
15/36+1/272.8/9×
33.12×5/6–2/9×5/4+1/44.8×
6÷5.63/8–3/8÷5/96.4/7×5/9+3/7×
7.5/2-(3/2+4/5)8.7/8+(1/8+1/9)5/6+5/6×9.9
8/9-1/3
10.3/4×=28+4.4χ-5)×0.3=1.026.4χ-χ×0.12χ+1.80.9=7.2(95/49+3/1411.7×
12.6×(1/2+2/3)11/54/5+813.8××
5/6
5/6×–14.31
10/21)2/715.9/7-(–2/7–14×18×16.5/9
3/4
×25/16+2/3×17.4/5
12/155/6×8/718.14×–
9/24×19.17/32–3/4
2/9+1/3×20.3
3/25+3/721.5/7×2/3+1/622.3/14××2/3+5/623.1/5×1/224.9/22+1/11÷
11/5+4/325.5/3×
1526.45×2/3+1/3×
5/627.7/19+12/19×2/328.1/4+3/4÷21/16+1/229.8/7×21
1/530.101×–1/5×64-4531.50+160÷40(58+370)÷()18+35÷32.120-14452÷33.347+45×2-4160)58+3734()÷(64-9×5)35.95÷(64-4528
÷5÷×6+42420+580-64×2136.178-145÷23)136+6411÷(9+31×)()×(65-34537.812-700)2638.85+14×(14+208÷)18÷512-8208)×(284+16(39.
18+3540.120-364÷×))÷(58+3764-9×541.(8.5÷×42.(6.8-6.80.55)4.8
÷0.12×4.843.0.12×
1.63.21.63.244.(×1.5+2.5)÷
(2)×(1.5+2.5)÷4=5.38+7.85-5.37=45.6-1.6÷3-0.43=46.7.2÷5=6-1.19×0.8-1.2×1.9×1.9+0.32×=0.684.8-1.247.6.5×(×4)0.4-5.748.10.15-10.75×3.743.87-0.1349.5.8×()+4.2×2.5)×3.26+9.72850.32.52-(÷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)
49/9-4/31.3/7×15/36+1/272.8/9×
32/9×5/63.12×–5/4+1/44.8×
6÷–3/83/85.6÷5/9
×5/9+3/7×6.4/7
3/2+4/5)(7.5/2-
1/8+1/9)8.7/8+(
5/6+5/6×9.9
8/9-1/3
10.3/4×=28+4.4χ×)0.3=1.026.4χ--0.12χ+1.8×0.9=7.2(95χ5/49+3/1411.7×)12.6×(1/2+2/3
11/54/5+8××13.8
5/6
5/6–×14.31
10/21)(15.9/7-2/7–2/7×18×–1416.5/9
3/4×17.4/5×25/16+2/3
12/155/6×–18.14×8/7
9/243/4×–19.17/32
2/9+1/320.3×
3/25+3/7×21.5/7
2/3+1/6××22.3/14
2/3+5/6×23.1/5
1/2÷24.9/22+1/11
11/5+4/325.5/3×15×2/3+1/3×26.45
5/6
×27.7/19+12/19
2/328.1/4+3/4÷21/16+1/2×29.8/7
21
1/530.101×1/5–×)÷31.50+16040(58+370)÷(64-4518+35÷32.120-144522-4160÷33.347+45×)×34(58+37)÷(64-9564-45)35.95÷(28
÷×36.178-145÷5×6+42420+580-6421÷×37.812-700÷(9+3111)(136+64)×(65-34523)÷38.85+14×(14+20826))×(39.(284+16512-8208÷18)18+35×40.120-364÷)÷(41.(58+3764-9×5)8.5×42.(6.8-6.80.55)÷4.8
4.843.0.12×÷0.12×1.6))÷3.2×(1.5+2.51.63.244.(×1.5+2.5)÷(24=5.38+7.85-5.37=45.6-1.6÷3-0.43=×5=6-1.19×0.8-1.246.7.2÷1.9×=0.68×4)×1.9+0.324.8-1.247.6.5×(0.4-5.7×48.10.15-10.753.74
×+4.2)3.87-0.13×(49.5.8.
2.5)×3.26+9.72850.32.52-(÷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).