初一数计学算题答案及125.X(8+1)0=125.X81+2.5X0110+=215.=2.52123-91(3+82.)8=193-212-8.389=00-08.8=891.92124.X8.38.+3X1.67=83X(.1.24+.167)=8.3X32=.999994X011099=9X9(00101+=)9999X100+9909X91=1000899149.8X.6-6.336X5.+.383X7.=(148-..56)X.3+8.36X3.78.=3X63.8.3X+3.7.83(X63.+37.)8=3.X10=38.2140+78.8.76+=(.2418+76).+0.78= 100+78.=01.8793-315-473=933-(51+473=)93-3002=734328-1998=482-11000+2=823I323X25X125=X4X125X825(4X=5)X2(8X21)5=00X1000=11000000948-286=2(600+2600+6020+248-126=60202-+6620-0262+600-6+12482269=-10+010+100+40=8348281-843=(219+1591)-403 4=1920-341+59十143=0+37332X.24.3X.37-152.5X0.432X16=3.242.3X3.7X-15.52X423.1.6X4=2.3X(3.2X375-1..52X1.)=4263.X4(0.8X3X.5-17.5X2X0.44=)243.X4(0X.4X2X37.5-1.2X45X04).4=.23X(4x0.4x7.51.-5x420.4x)=42.3X4[X.04X(.7-5.215)=]42.X3[4X04.X6.52]42.3=X(42.5X)=4231.871+-8.1-50.5X0.=3.8+12-0.115=3.810.15-=13.656.5X83.5+X84-=527+8247-=0-478(0-8.8)9X5分之2-.132=0.2X275/-1.23=2.08-1.83 =262.7687X分之-[1-4(32.-.95)2=]8X47-/[1-0.2]58X4=7/-4=87/2070(X506-994)-009=2700X-7900=18900-90=2013302.(1-4.48—9.850-2.5)=33.02—5.7552.5-3=3.0—22.03=201(11-—1)-.51=(1—1)5-.=01-.1=05181.(+3—.099-202.)3X1=81.+11.7X11=8.1+.71=918.卜1]+892卜+25+]6=019 [-3+[]2-][+1-]++10+2二-3卜301+1]52+31+07卜]5=05[-1+]-[12/+]34/+[-/4]1=-1[-7/]+2/5+[-06.5]+45/1+/961.2二5[26-.54][-6.1+]418.+5+6.144二-81.152+[1-/57]+[1-8]+[-/0.]=6-3[-98+6+(787-]*)2[365(+75)--7)(-]8+(4+35+)2*18/2--596862/18-1-18+*6-2/197/--569.4-6-3/(4+1.64-3-4)/1/23++/5-7/621[/2-34-1/4*(0.-)]4//31+22+2-(4)(+2)+4-3*2*--88*12/8/+/81(2/3+/1)2(/1/12-)(-*21)-(2)/8-(6+)4(-+1)2/(-)20+7/-(-)8(*-)2(1/-4/6+513/2+/3/)/118-26(-/3)*(-)25(3+/88*/0/(-32)3(-8-4/)*2-3)((/6)- 12*(/4-15)/2//33x-2+y-x5-y743712X+72X756〔37-5(1+21)8〕-512160-(〔8-73)9X18〕20+848-024X535-213X(266—205)85(9X—5414-04)528780-(10+52X2)04173X7227+X63518432-1(352X+78)37[.5-87.8(5+.46)]X30156X([7.17-7.)2-]3(94—7995)7+X6646X3(913—26-27)31[2—(954+83)]X76[(.175.6-X)0.-191.]-2.5518324-(13X52+78).54-2.6[X3.7(2-.9)0+.2]6(497—599)+76X664—0(9.5+829).]0.-821.881-0.34—024.X35.02[X2.(441—8).-04+.01.5]28-3(41.25.X2.)40.8X15〔.-(3521..759)〕(1.833.2X)4514—69.481.8-X09.36.7-42.5X29.39.146-(.0016X3)5.08[X(10—67.6)-1.2(]1366+)X4(65-345-2)(6.83-.68X0.55-8)50..12X48-0..21X48.(58+3)7(-64-9X5)81270-0-(9+1X131().23X1.5+.25)-1.658+4X(14+108-26)212-306X4-18+352(48+1)X6(52-12880-1)8.972X.16-81.350-7/7-4[1/3X(/53-/301)](4/51+/)4-7/+3/1071278.0—-(31.+4165.6)
37.8127-00(-9+3X111)(31+64)6 X(6-3455-3)23.2X1(5+2.5.-).1856+41X(142+0-286)(5+83)十764(9X-5)(6.-68.80X5.5)-.58(248+61X()152-2088-180.12)X4.8-0.1X42.83.(2X15.2+.5)-1.6120-3X641-8+315.10-15.075X0.45-.758.(3X.78-01.3+4.2)X3.7443+745X-4120-62532.2-5(69.+728-.2)3X.285(75+83)7-(6-49X5)[(71.5-.6X).90-1.1]5-.52(3.2X.5+21.5)1-6..45-[2.6(3.7X-2.9)+0.62]12X-(1627-2.)-632.X6+(15.+.25)-1.63(2X1..+2.55)1.6-5.X(8.37-8.031)+.4X23.7433.20—148.(—90485).-2.51)23+(73)(2-)(8-)4(-4+)9(3)+(7-2.40)(44.)32(-+.57)7()5(-73/+()7-/6)(6)/94(-+3/2)7)3(75+.(.25)25+/4(8)-.753(+5+4)+/-(.51)(9)-(174)/+(10/3-)++(313/)(+1/13)(1)0(1.8)+-(0.+)+(-2.7)+(01.)1(++.81)++1.()4 11)(+1(3).-(17./7)+(2)1(-)2(+-/23)(31|)(7.2)-(--.63+()11).|1(4)|(-5/4-()-/3)4|1卜-/5-4卜34/|)(5)(1-/291)9*(7/6-3/-28+3/)(16)4a*(-)b3)*5()*c1/6.13/7X49/9-432./8/X915/631+/723.2X5/61-2/X934.8X5/4+14/5.6-38/—/38-66.47/5X9/3/7+X5/97./52(3-2/+/45)8.78/(+18+1/9/9)9.X/65+/561.3/04X8/-91/3012x.+1.8X.90=.2(79—5)xX03.1=0.264.x-X=2+8.441.17X5/4+93/1412.6(X1/+2/23)31.8X4/58X+1/5114.13X5/6—5/61 .5/97-2(/7—1/20)1 615/.X918—1X2/4771./54X5/162+/3X3/421.814X8/7-/6X51/2115.9/仃23-/439X24/20.3X29/+/312.15/7X3/52+3/722.3/14XX23/+1/236.15/X23/5/+62.9/242+1/11-122/5./5X1135/+4/26.35X4/32+/13X15727/.19+211/9X56/2.18/4+3/-4/3229.8/X271/6+1/1230101.X1/5-15/X213150.+601-40(85370)+十(46-5)423.12-0144-1+3853.334+4752X-164-50234(58+73)(-46-X59)3.559-(46-453).618-14755X-642+420+580-6X42-18273812.700-(-931+X1)1136(64+)(X5634-5-2)3 3.88+541X(14+082十2)639.(284+16)(512X820-8-1)84.102-03X64-18+534.(15+378)(-6-945)X4.(628.6-.8X055)-.8.5430.12X..48-012.4X.84.43(.X2.152+.5)-.612)(32.(X1.+525.)-1.645.-61.6-4=538.7.85-+5.73=6.472-.0.8-1.2X5=-16.19X30.4-3=47.6.5X4(.-8.12X4)=.60X8.190+3.X219.4.81.0511-0.7X05.-547.9.54.8(X.3870-13.)+.42X3.745032.5.-(26+9.278-3.)22X5.51.5-+8+53+901+87--56(+5)025.-7*2-75/(533.(-)*72(/1/)3+79/(3+/64)54.123+46+587+998(/-455)36.933/--54(31-/155.5)6.9+{33[x422x/(x83)}]57.9xx785x/4+()65811x.2/2(41+2/)295.4+(96-)01/01.a A-23bA3+a(b2-ba=)A3a2+aA2-2bbA3-bA2二aA2(a+2b)-baA(22+ba)(a=2b+(aA)-2bA)2=(a+2b()+b)(aab-).2&2八丫八+)2八2-4丫&2+八八丫2+)丫八42&八=+丫22-八丫2)八23.(xA+2x)A2+3(2xA+2x2)+Ax+22x3+=(Ax2+2)Ax2+4(Ax+22x+3)=x(A22x++)(3A2x2+x+1=(xA2)+2x+)(x+31A)4.2(+a)1(+a2)+2(a1)(+a-)2-2=a1A23a++22+A2a-a-3212=3-A2-a21=3(a2)+a(2)-.5Ax(y+z)A22-x2yx-z()y+z)+(yA2(-xz)A二2［(x+y)zy(x-z-)F2 =(
xzy+z)八2=z2A(+yxA2)6.3(a2+)A+228(+a2)2-0二[3(a+2)2][(a+-2+1)]0(3=+a4)(+12)a.7a(+bA2-)b-()cA2aA+2cA-=2(+a)bA-2cA2+aA2(b-c-)2A=a(++c)(a+b-bc+(a+b-)c(a-b)+c)=(+b-c)(aa+bc+a+b+-c)2(=+abc-)a+()c8x.(+x1()Ax2x+-)-21=(xA+x2()A2x+x1)-2-=(Ax2x+)2-Ax(2+A)x2=-(xA+x-2)(2xA+x21+=(x+))2x(1)(-A2xx++11)./7X349/9-/342.8/9X1/536+1/72.3215X6/-29/X348.5/X4+/415. 6-3/8—3/8-664/.X759/+3/75/X795/.-(23/2+4/)5.8/87+(18/+1/)99.9X5/6+5/610./34X8/9-1/30.12x1.8+X0.9=7.2(9—5xX).031.=02.64x-=2X+4.481.7X1/594+/1314.26(X/2+12/3)13.84X5/+8X115/1.4135X6—/5/156.9/7-(27—/1/012)16.5/9X81-14X/721.745/X2/165+2/X3/3418.14X/78-56/X2/1511.917/233—4/X9/220.432/X9+/312.15/7X3/25+/372.3/14XX223/+/1236.15/X23+/5/642./29+21/11-12/5.2/3X511/54/+3 2.6452X3/+1/3X152.77/19+12/9X516/2.8/41+/4-323/2.98/7X21/16+12/03.10X115/-1/5X2131.50+1604-(085+370十)6(-454)32.12-0414-18+533.343+457X2-160-4254358+(3)7-(469-X)53595.(-6-44)53617.-81455-X+462240+805-4X62-12837.81-7200(-+93X111)(361+6)X(456-354-23)8.3851+X4(142+08-2)639.(248+61)(X125-280-818)40.10-3624X-8+35141(.5+837-()6-94X5)24(.6.8-68X.05.)-8.554.0.3214.X8-.012X48.4.(3.24X1.5+2.5)-.1(2)6.23X(1.5+25.)-1.64.5-16.6-4=.358+7.855.37-=4.67.2-08-1..X25=-1.169X30.43-=476..X5(.481.-2X4)0=6.X8.91+.032X.91 4.180.15-0175X0..4-5.749.5.8X(.387-0.1)34+2.X.3470.52.32-56(+9728.-3.2X)25.1.-5+55+81+30+987(--65+5)05.27-2-*5/(7335.(-7*2)(1//)37+9(/+6/4)35.1423+56+47989+/8-(4)55.69333/(-54-3-/15.5)51.396+{3x[2/2x(348)]}x57.98xx/75x(46+58.1)1x22(4+12//2)5994+.(60)/-011a.3A-2b3Aa+b(a2-)b=aA32a+A2b-b23-AbaA=2Aa(2+2a)-bAb(22b+a)=a+2b)((a2-AAb)2(=+ab2)a(+)(a-bb2).&八2丫+八)八2-24丫&八2丫八+2+)4丫八=2&八+2丫2八-丫2)八3.2(x 2+2xAA2+3)x(2A+2x)+x2+Ax23=(+A2+x2x)2+4A(Ax+22)+3x(xA2=+x2+3()A2x2x+1+)=(x2A2x+3+(x)+)A12.4a(1+)a+2()(2++a)(1-2a-1)=2A2a3++2+2aa2A3--2a-12=aA3-1223=(+2)(a-a)2.x52(yAz+)A22x-yx(z-()+y)+yz2(x-zAA2)=[(xyz)-+(x-z)y]A=(2z+yzx)A2zA=(2+x)yA26.3(+2aA2)+8(2+a2-20)二3([a+)2-]2[(+a)+10]=(23a+4)(+a1)27.(a+bA2)-(b-cA)+2a2A-A2c=a(b+)2AcA-2+A2-(b-c)A2a=(+bac)+(a+b-)c(a++-b)(c-abc)+ =(a+b-)(acb++c+-b+a)c=(2ab-c)+(+ac)8.xx(+1)(Ax+2x1)--2=x(A+2)xx(A+x2-)-21=(A2xx)A2-(x+2A+x)2=(x-A+x-2)(x2A+2x+1=(x)2+()x-)(1A2x++x)1
发布于 2025-01-15 14:52:11
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