有理数计算题500道附答案

发布网友发布时间：2022-05-05 23:43

共2个回答

热心网友时间：2022-06-28 08:07

1.（3m-n-p)（3m+n-p)2.-(x+y)^2-2(x-y)(x+y)3.(-2x-y)^2-(-x-y)(x-y)-2(x-y)(x+2y)4.(2m^4n^3+16m^3n-2m^2n)/(-2m^2n)5.-9.9*10.16.5^10*3^2*2^97.123^2-124^3*1228.39+[-23]+0+[-16]=09.[-18]+29+[-52]+60=1910.[-3]+[-2]+[-1]+0+1+2=-311.[-301]+125+301+[-75]=5012.[-1]+[-1/2]+3/4+[-1/4]=-113.[-7/2]+5/6+[-0.5]+4/5+19/6=1.2514.[-26.54]+[-6.14]+18.54+6.14=-815.1.125+[-17/5]+[-1/8]+[-0.6]=-316.[-|98|+76+(-87)]*23[56+(-75)-(7)]-(8+4+3)17.5+21*8/2-6-5918.68/21-8-11*8+6119.-2/9-7/9-5620.4.6-(-3/4+1.6-4-3/4)21.1/2+3+5/6-7/1222.[2/3-4-1/4*(-0.4)]/1/3+223.22+(-4)+(-2)+4*324.-2*8-8*1/2+8/1/825.(2/3+1/2)/(-1/12)*(-12)26.(-28)/(-6+4)+(-1)27.2/(-2)+0/7-(-8)*(-2)28.(1/4-5/6+1/3+2/3)/1/229.18-6/(-3)*(-2)30.(5+3/8*8/30/(-2)-331.(-84)/2*(-3)/(-6)32.1/2*(-4/15)/2/333.-3x+2y-5x-7y34.75÷〔138÷（100-54）〕35.85×(95－1440÷24)36.〔75-（12+18）〕÷1537.2160÷〔（83-79）×18〕38.280＋840÷24×539.325÷13×(266－250)40.85×(95－1440÷24)41.58870÷(105＋20×2)42.1437×27＋27×56343.81432÷(13×52＋78)44.[37.85-（7.85+6.4）]×3045.156×[(17.7-7.2)÷3]46.（947－599）＋76×6447.36×(913－276÷23)48.[192－（54＋38）]×6749.[（7.1-5.6）×0.9-1.15]÷2.550.5.4÷[2.6×（3.7-2.9）+0.62]51.（947－599）＋76×6452.81432÷(13×52＋78)53.50.4÷[2.6×（3.7-2.9）+0.62]54.（31.83.2×4）÷5（0.016×35）55.3.416÷5356.0.8×[(10－6.76)÷1.2]57.2.881÷0.43－0.24×3.558.（136+64）×（65-345÷23）59.(6.8-6.8×0.55)÷8.560.－(9.5＋28.9)]÷0.1861.0.8×〔15.5-(3.215.79)〕62.20×[(2.44－1.8)÷0.4＋0.15]63.194－64.8÷1.8×0.964.52.28-(3.41.25×2.4)65.0.12×4.8÷0.12×4.866.（58+37）÷（64-9×5）67.812-700÷（9+31×11）68.（3.2×1.5+2.5）÷1.669.85+14×（14+208÷26）70.120-36×4÷18+3571.（284+16）×（512-8208÷18）72.9.72×1.6-18.305÷773.54.36.72÷4.25×9.974.（136+64）×（65-345÷23）75.(6.8-6.8×0.55)÷8.576.0.12×4.8÷0.12×4.877.（58+37）÷（64-9×5）78.812-700÷（9+31×11）79.（3.2×1.5+2.5）÷1.680.85+14×（14+208÷26）81.120-36×4÷18+3582.（284+16）×（512-8208÷18）83.9.72×1.6-18.305÷784.23+(-7.57)85.(-7/3)+(-7/6)86.9/4+(-3/2)87.3.75+(2.25)+5/488.-3.75+(+5/4)+(-1.5)89.(-17/4)+(-10/3)+(+13/3)+(11/3)90.(10)(-1.8)+(+0.2)+(-1.7)+(0.1)+(+1.8)+(+1.4)91.(+1.3)-(+17/7)92.(-2)-(+2/3)93.|(-7.2)-(-6.3)+(1.1)|94.|(-5/4)-(-3/4)|-|1-5/4-|-3/4|)95.(-2/199)*(-7/6-3/2+8/3)96.4a)*(-3b)*(5c)*1/697.7×5/49+3/1498.6×（1/2+2/3）99.8×4/5+8×11/5100.31×5/6–5/6希望对你有用!

热心网友时间：2022-06-28 08:08

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)^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-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)^26.3(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)