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初一100道数学计算题及答案

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1.25×（8+10）=1.25×8+1.25×10=10+12.5=22.59123-（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=24.99999×1001=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+8.3×3.78.3×（6.3＋3.7）=8.3×10=83
1.24+0.78+8.76=（1.24+8.76）+0.78


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=10+0.78=10.78933-157-43=933-（157+43）=933-200=7334821-998=4821-1000+2=3823I32×125×25=4×8×125×25=（4×25）×（8×125）=100×1000=1000009048÷268
=（2600+2600+2600+1248）÷26
=2600÷26+2600÷26+2600÷26+1248÷269=100+100+100+48=3482881÷43
=（1290+1591）÷434=1290÷43+1591÷43


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=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×[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


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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


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[-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=-81.125+[-17/5]+[-1/8]+[-0.6]=-3
[-98+76+(-87]*23[56+(-75-(7]-(8+4+35+21*8/2-6-5968/21-8-11*8+61-2/9-7/9-56
4.6-(-3/4+1.6-4-3/41/2+3+5/6-7/12[2/3-4-1/4*(-0.4]/1/3+222+(-4+(-2+4*3-2*8-8*1/2+8/1/8(2/3+1/2/(-1/12*(-12(-28/(-6+4+(-12/(-2+0/7-(-8*(-2(1/4-5/6+1/3+2/3/1/218-6/(-3*(-2(5+3/8*8/30/(-2-3(-84/2*(-3/(-61/2*(-4/15/2/3


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-3x+2y-5x-7y
1437×27＋27×563〔75-（12+18）〕÷152160÷〔（83-79）×18〕280＋840÷24×5325÷13×(266－25085×(95－1440÷2458870÷(105＋20×21437×27＋27×56381432÷(13×52＋78[37.85-（7.85+6.4）]×30156×[(17.7-7.2÷3]（947－599）＋76×6436×(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-(3.41.25×2.40.8×〔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）÷1.685+14×（14+208÷26）120-36×4÷18+35
（284+16）×（512-8208÷18）9.72×1.6-18.305÷74/7÷[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）


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(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）÷1.6120-36×4÷18+3510.15-10.75×0.4-5.7
5.8×（3.87-0.13）+4.2×3.74347+45×2-4160÷5232.52-（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）÷1.65.4÷[2.6×（3.7-2.9）+0.62]12×6÷（12-7.2）-63.2×6+（1.5+2.5）÷1.6（3.2×1.5+2.5）÷1.65.8×（3.87-0.13）+4.2×3.7433.02－（148.4－90.85）÷2.5123+(-73(2(-84+(-49(37+(-2.04(44.23+(-7.57(5(-7/3+(-7/6(69/4+(-3/2(73.75+(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


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(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(164a*(-3b*(5c*1/61.3/7×49/9-4/32.8/9×15/36+1/273.12×5/6–2/9×34.8×5/4+1/45.6÷3/8–3/8÷66.4/7×5/9+3/7×5/97.5/2-（3/2+4/5）8.7/8+（1/8+1/9）9.9×5/6+5/610.3/4×8/9-1/3
0.12χ＋1.8×0.9=7.2(9－5χ×0.3=1.026.4χ-χ=28+4.411.7×5/49+3/1412.6×（1/2+2/3）13.8×4/5+8×11/514.31×5/6–5/6
15.9/7-（2/7–10/21）16.5/9×18–14×2/717.4/5×25/16+2/3×3/4


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18.14×8/7–5/6×12/1519.17/32–3/4×9/2420.3×2/9+1/321.5/7×3/25+3/722.3/14××2/3+1/623.1/5×2/3+5/624.9/22+1/11÷1/225.5/3×11/5+4/326.45×2/3+1/3×1527.7/19+12/19×5/628.1/4+3/4÷2/329.8/7×21/16+1/230.101×1/5–1/5×21
31.50＋160÷40（58+370）÷（64-45）32.120-144÷18+3533.347+45×2-4160÷5234（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）


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40.120-36×4÷18+3541.（58+37）÷（64-9×5）42.(6.8-6.8×0.55÷8.543.0.12×4.8÷0.12×4.8
44.（3.2×1.5+2.5）÷1.6（2）3.2×（1.5+2.5）÷1.645.6-1.6÷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+0.32×1.948.10.15-10.75×0.4-5.749.5.8×（3.87-0.13）+4.2×3.7450.32.52-（6+9.728÷3.2）×2.551.-5+58+13+90+78-(-56+5052.-7*2-57/(3
53.(-7*2/(1/3+79/(3+6/4）54.123+456+789+98/(-455.369/33-(-54-31/15.556.39+{3x[42/2x(3x8]}57.9x8x7/5x(4+658.11x22/(4+12/259.94+(-60/101.
a^3-2b^3+ab(2a-b


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=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-b2.
(x^2+y^2^2-4y(x^2+y^2+4y^2=(x^2+y^2-2y^23.
(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+1^24.
(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-25.
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


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6.
3(a+2^2+28(a+2-20=[3(a+2-2][(a+2+10]=(3a+4(a+127.
(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+c8.
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+11.3/7×49/9-4/32.8/9×15/36+1/273.12×5/6–2/9×34.8×5/4+1/45.6÷3/8–3/8÷66.4/7×5/9+3/7×5/9


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7.5/2-（3/2+4/5）8.7/8+（1/8+1/9）9.9×5/6+5/610.3/4×8/9-1/3
0.12χ＋1.8×0.9=7.2(9－5χ×0.3=1.026.4χ-χ=28+4.411.7×5/49+3/1412.6×（1/2+2/3）13.8×4/5+8×11/514.31×5/6–5/6
15.9/7-（2/7–10/21）16.5/9×18–14×2/717.4/5×25/16+2/3×3/418.14×8/7–5/6×12/1519.17/32–3/4×9/2420.3×2/9+1/321.5/7×3/25+3/722.3/14××2/3+1/623.1/5×2/3+5/624.9/22+1/11÷1/225.5/3×11/5+4/326.45×2/3+1/3×1527.7/19+12/19×5/6


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28.1/4+3/4÷2/329.8/7×21/16+1/230.101×1/5–1/5×21
31.50＋160÷40（58+370）÷（64-45）32.120-144÷18+3533.347+45×2-4160÷5234（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+3541.（58+37）÷（64-9×5）42.(6.8-6.8×0.55÷8.543.0.12×4.8÷0.12×4.8
44.（3.2×1.5+2.5）÷1.6（2）3.2×（1.5+2.5）÷1.645.6-1.6÷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+0.32×1.948.10.15-10.75×0.4-5.749.5.8×（3.87-0.13）+4.2×3.74


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50.32.52-（6+9.728÷3.2）×2.551.-5+58+13+90+78-(-56+5052.-7*2-57/(3
53.(-7*2/(1/3+79/(3+6/4）54.123+456+789+98/(-455.369/33-(-54-31/15.556.39+{3x[42/2x(3x8]}57.9x8x7/5x(4+658.11x22/(4+12/259.94+(-60/101.
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-b2.
(x^2+y^2^2-4y(x^2+y^2+4y^2=(x^2+y^2-2y^23.
(x^2+2x^2+3(x^2+2x+x^2+2x+3=(x^2+2x^2+4(x^2+2x+3


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=(x^2+2x+3(x^2+2x+1=(x^2+2x+3(x+1^24.
(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-25.
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^26.
3(a+2^2+28(a+2-20=[3(a+2-2][(a+2+10]=(3a+4(a+127.
(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


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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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