七年级有理数四则混合运算题九十道有答案解析的]

-.z.七年级有理数四则混合运算九十道〔有答案的〕39+[-23]+0+[-16]=0[-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=-81.125+[-17/5]+[-1/8]+[-0.6]=-3[-|98|+76+(-87)]*23[56+(-75)-(7)]-(8+4+3)5+21*8/2-6-5968/21-8-11*8+61-2/9-7/9-564.6-(-3/4+1.6-4-3/4)1/2+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)+(-1)2/(-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)/(-6)1/2*(-4/15)/2/3-3*+2y-5*-7y有理数的加减混合运算答复者：370116-翰林文圣十八级1-2210:56我来评论>>您觉得最正确答案好不好"目前有5个人评价60%〔3〕40%〔2〕相关容·初中一年级有理数混合〔300道以上〕带答案·谁有小学六年级至初一有理数的计算的计算题啊"·关于有理数计算题和答案·谁有初一有理数计算题〔我要1000道〕·编写一个小学数学辅助教学软件,主要是测试小学低年...更多关于300道简单的有理数运算的问题>>查看同主题问题：有理数的混合运算其他答复共1条1．计算题〔1〕3．28-4．76+1-；〔2〕2．75-2-3+1；〔3〕42÷〔-1〕-1÷〔-0.125〕;〔4〕(-48)÷82-(-25)÷(-6)2;〔5〕-+()×(-2.4).2.计算题：〔10′×5=50′〕〔1〕-23÷1×〔-1〕2÷〔1〕2；〔2〕-14-〔2-0.5〕××[()2-()3];〔3〕-1×[1-3×(-)2]-()2×(-2)3÷(-)3〔4〕(0.12+0.32)÷[-22+(-3)2-3×];(5)-6.24×32+31.2×(-2)3+(-0.51)×624.[-|98|+76+(-87)]*23[56+(-75)-(7)]-(8+4+3)5+21*8/2-6-5968/21-8-11*8+61-2/9-7/9-564.6-(-3/4+1.6-4-3/4)1/2+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)+(-1)2/(-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)/(-6)1/2*(-4/15)/2/3-3*+2y-5*-7y75÷〔138÷〔100-54〕〕85×(95－1440÷24)80400－(4300＋870÷15)240×78÷〔154-115〕1437×27＋27×563〔75-〔12+18〕〕÷152160÷〔〔83-79〕×18〕280＋840÷24×5325÷13×(266－250)85×(95－1440÷24)58870÷(105＋20×2)1437×27＋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-(3.41.25×2.4)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÷×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×÷74/7÷[1/3×〔3/5-3/10〕]〔4/5+1/4〕÷7/3+7/1012.78－0÷〔13.4＋156.6〕37.812-700÷〔9+31×11〕〔136+64〕×〔65-345÷23〕3.2×〔1.5+2.5〕÷1.685+14×〔14+208÷26〕〔58+37〕÷〔64-9×5〕×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+3510.15-10.75×0.4-5.75.8×〔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〕÷2.5(一)计算题:(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)*1/61.3/7×49/9-4/32.8/9×15/36+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+5/610.3/4×8/9-1/30.12χ＋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+8×11/514.31×5/6–5/615.9/7-〔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+12/19×5/628.1/4+3/4÷2/329.8/7×21/16+1/230.101×1/5–1/5×2131.50＋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÷2837.812-700÷〔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÷0.12×4.844.〔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=××4〕=0.68×1.9+0.32×1.948.10.15-10.75×0.4-5.7×〔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/(353.(-7)*2/(1/3)+79/(3+6/4〕54.123+456+789+98/(-4)55.369/33-(-54-31/15.5)56.39+{3*[42/2*(3*8)]}57.9*8*7/5*(4+6)58.11*22/(4+12/2)59.94+(-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-b)2.(*^2+y^2)^2-4y(*^2+y^2)+4y^2=(*^2+y^2-2y)^23.(*^2+2*)^2+3(*^2+2*)+*^2+2*+3=(*^2+2*)^2+4(*^2+2*)+3=(*^2+2*+3)(*^2+2*+1)=(*^2+2*+3)(*+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.*^2(y+z)^2-2*y(*-z)(y+z)+y^2(*-z)^2=[*(y+z)-y(*-z)]^2=(*z+yz)^2=z^2(*+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.*(*+1)(*^2+*-1)-2=(*^2+*)(*^2+*-1)-2=(*^2+*)^2-(*^2+*)-2=(*^2+*-2)(*^2+*+1)=(*+2)(*-1)(*^2+*+1)(尽力了!)