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        1. }Ŀώُ(gu)I(mi)bW(xu)һͯ(ji)(dng)(hu)(chng)NЦĘ͐(i)ăɷNɷNăr(ji)ͬͬһNĚr(ji)ͬڕ(hu)(chng)Ҫُ(gu)I(mi)˵ÿ4(g)ÿr(ji)Dʾ
          1ЦĘĆ΃r(ji)xԪՈ(qng)úxĴ(sh)ʽʾڢڢĿr(ji)Ҫ󻯺(jin)ڈDУ
          2ڢĿr(ji)X(qin)ȵڢĿr(ji)X(qin)2Ԫ@ɷNĚĆ΃r(ji)

          𰸡
          1⣺ЦĘĆ΃r(ji)xԪt(i)ĚĆ΃r(ji)ǣ143xԪ(j)}

          ڢĿr(ji)ǣx+3143x=x+429x=428xԪ

          ڢĿr(ji)ǣ2x+2143x=2x+286x=284xԪ


          2⣺}428x=284x2

          x=4

          143x=2

          ЦĘĆ΃r(ji)4Ԫ(i)ĚĆ΃r(ji)2Ԫ


          1ЦĘĆ΃r(ji)xԪɵڢĿr(ji)X(qin)14Ԫó(i)ĚĆ΃r(ji)ǣ143xԪ(j)ÿĿr(ji)X(qin)=ЦĘăr(ji)X(qin)+(i)Ěăr(ji)X(qin)ڢڢĿr(ji)2(j)ڢĿr(ji)X(qin)ȵڢĿr(ji)X(qin)2Ԫг̼ⷽɣ

          (x)(c)ϵд
          P(gun)(x)}

          ĿД(sh)W(xu) (li)Դ

          }Ŀȥ̖(ho)_()

          A. x2-(3x-2)=x2-3x-2

          B. 7a+(5b-1)=7a+5b+1

          C. 2m2-(3m+5)=2m2-3m-5

          D. -(a-b)+(ab-1)=a-b+ab-1

          鿴𰸺ͽ>>

          ĿД(sh)W(xu) (li)Դ

          }ĿDOİ돽ODABc(din)CBY(ji)AOL(zhng)Oc(din)EBY(ji)ECAB=8CD=2ECL(zhng)

          鿴𰸺ͽ>>

          ĿД(sh)W(xu) (li)Դ

          }Ŀ֪ABCA=50

          1DABCACBĽƽ־c(din)OtBOC=

          2DABCACBȷ־քe(du)(yng)O1O2tBO2C=

          3DABCACBnȷ־քe(du)(yng)O1O2On1(ni)n1(g)c(din)BOn1CnĴ(sh)ʽʾ

          4D֪ABCACBnȷ־քe(du)(yng)O1O2On1BOn1C=60nֵ

          鿴𰸺ͽ>>

          ĿД(sh)W(xu) (li)Դ

          }Ŀijξc(din)·ݹӴο25f(wn)˴·ݹӴο64f(wn)˴O(sh)ÿµƽL(zhng)ʞxtз̞飨
          A.251+x2=64
          B.25+251+x2=64
          C.251+2x=64
          D.641x2=25

          鿴𰸺ͽ>>

          ĿД(sh)W(xu) (li)Դ

          }ĿиMܽMεǣ

          A. 2cm3cm5cm B. 5cm6cm10cm

          C. 1cm1cm3cm D. 3cm4cm8cm

          鿴𰸺ͽ>>

          ĿД(sh)W(xu) (li)Դ

          }ĿD1c(din)OֱABһc(din)^(gu)c(din)O侀OCʹBOC=120һ30Ƚǵֱǰֱc(din)c(din)O̎һ߅OM侀OBһ߅ONֱAB·DСOMN=30NOM=90㣩
          1D1еǰ@c(din)Or(sh)D(zhun)D2ʹOMڡBOCă(ni)ǡƽ֡BOC(wn)ֱONǷƽ֡AOCՈ(qng)f(shu)
          2D1еǰ@c(din)Oÿ6ٶr(sh)?l)D(zhun)һD(zhun)^(gu)Уtr(sh)ֱONǡƽJǡAOCt
          3D1еǰ@c(din)O형r(sh)D(zhun)D3ʹONڡAOCă(ni)Ո(qng)?zh)AOMcNOC֮gĔ(sh)P(gun)ϵf(shu)ɣ

          鿴𰸺ͽ>>

          ĿД(sh)W(xu) (li)Դ

          }Ŀ֪4y2+my+1ȫƽʽt(sh)mֵ_________

          鿴𰸺ͽ>>

          ĿД(sh)W(xu) (li)Դ

          }Ŀijl(xing)(zhn)I(y)a(chn)мg(sh)15a(chn)˺ƶa(chn)Ʒÿa(chn)~y(tng)Ӌ(j)@15ijµļӹ(g)(sh)

          ÿ˼ӹ(g)(sh)

          540

          450

          300

          240

          210

          120

          ˔(sh)

          1

          1

          2

          6

          3

          2

          (1)(xi)@15ԓ¼ӹ(sh)ƽ(sh)λ(sh)ͱ(sh)

          (2)a(chn)ؓ(f)؟(z)˰ÿλ˵¼ӹ(g)(sh)260J(rn)@(g)~Ƿʲô

          鿴𰸺ͽ>>

          ͬ(x)(c)