}ĿώُIbWһͯ(ji)ӕNЦĘ͐ăɷNɷNărͬͬһNĚrͬڕҪُI˵ÿ4ÿrDʾ
1ЦĘĆrxԪՈúxĴ(sh)ʽʾڢڢĿrҪڈDУ
2ڢĿrXȵڢĿrX2Ԫ@ɷNĚĆr
ĿД(sh)W Դ }ͣ
}Ŀȥ̖_()
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 Դ }ͣ
}Ŀ֪ABCУA=50
1DABCACBĽƽ־cOtBOC=
2DABCACBȷ־քeO1O2tBO2C=
3DABCACBnȷ־քeO1O2On1(ni)n1cBOn1CnĴ(sh)ʽʾ
4D֪ABCACBnȷ־քeO1O2On1BOn1C=60nֵ
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ĿД(sh)W Դ }ͣ
}Ŀijξc·ݹӴο25f˴·ݹӴο64f˴ΣO(sh)ÿµƽLʞxtз̞飨
A.251+x2=64
B.25+251+x2=64
C.251+2x=64
D.641x2=25
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ĿД(sh)W Դ }ͣ
}ĿD1cOֱABһc^cO侀OCʹBOC=120һ30ȽǵֱǰֱccO̎һ߅OM侀OBһ߅ONֱAB·DСOMN=30㣬NOM=90㣩
1D1еǰ@cOrD(zhun)D2ʹOMڡBOCă(ni)ǡƽ֡BOCֱONǷƽ֡AOCՈf
2D1еǰ@cOÿ6ٶrᘷD(zhun)һܣD(zhun)^trֱONǡƽJǡAOCt
3D1еǰ@cO형rD(zhun)D3ʹONڡAOCă(ni)Ո?zh)AOMcNOC֮gĔ(sh)P(gun)ϵfɣ
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ĿД(sh)W Դ }ͣ
}Ŀijl(xing)(zhn)I(y)a(chn)мg(sh)15a(chn)˺ƶa(chn)Ʒÿa(chn)~y(tng)Ӌ@15ijµļӹ(sh)
ÿ˼ӹ(sh) | 540 | 450 | 300 | 240 | 210 | 120 |
˔(sh) | 1 | 1 | 2 | 6 | 3 | 2 |
(1)@15ԓ¼ӹ(sh)ƽ(sh)λ(sh)ͱ(sh)
(2)a(chn)ؓ؟˰ÿλ˵¼ӹ(sh)260J@~Ƿʲô
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