}Ŀώُ(gu)I(mi)bW(xu)һͯ(ji)(dng)(hu)(chng)NЦĘ͐(i)ăɷNɷNăr(ji)ͬͬһNĚr(ji)ͬڕ(hu)(chng)Ҫُ(gu)I(mi)˵ÿ4(g)ÿr(ji)Dʾ
1ЦĘĆr(ji)xԪՈ(qng)úxĴ(sh)ʽʾڢڢĿr(ji)Ҫ(jin)ڈDУ
2ڢĿr(ji)X(qin)ȵڢĿr(ji)X(qin)2Ԫ@ɷNĚĆr(ji)
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
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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
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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
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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
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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
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ʡ(lin)W(wng)`ͲϢe(bo)ƽ_(ti) | W(wng)кϢe(bo)^(q) | p_e(bo)^(q) | vʷ̓o(w)xкϢe(bo)^(q) | ֙(qun)e(bo)^(q)
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