甘肃省东乡族自治县2023-2024学年数学七年级第一学期期末达标检测模拟试题含解析

2023-2024

üi»«:

1.£WF,#±ÆWêB®^,«WWWWmiWSWEM

2.

4.^fflRT^ffl^ôHi,

5.WBM^ÿf£.#«,>IE^,smzio

-,&#®(</b®3#,#30#)

i.T^Ji^®.âWTOK)

A.B.St&WAMMtâ

c.D.±WOm&

2.W±“0cm”r8cm”»m±li?|-3Slx,

3PAx®<A()

-30x

—*RFRW8^^^*w^rr’

|OI2345678|

A.8B.7C.6D.5

3.1250000000ÆW,1250000000()

A.125xl07B.12.5xl08C.1.25xl09D.1.25x10

4.^-2-(+5)-(-7)+(-9)W«^()

A.-2+5-7-9B.-2-5+7+9

C.-2-5-7-9D.-2-5+7-9

5.W,Tÿ!m&iEm>()

5\M

\

75°Ac<io°?

ffi<7X45°£

c/5<Z>

Wi

A.OA3f|é]M4t1â$30°^|RjB.OB^fàêzfMS®75°^|p]

C.OC^fà^miSffiTS0^®D.

6.-19$jm()

11

A.19B.------C.—D.-19

1919

7.()

A.3x+6y=9xyB.-a2-a2=0

C.2(3x+2)=6x+2D.-(3x-2y)=-3x+2y

8.)

A.3x2yft-2x2yB.-xy2yxC.—l^D1D.~2x2y#xy2

9.AlEffi<?iJÔÙWKM()

B.

10.20181590000007Ü,15.29%,WïfcJS159000000

()

A.1.59X108B.0.159x10’C.1.59x107D.159xl06

WS®(*AH£W6/h®,«<h®3#,£18#)

11.«=«$&.

12.#2/77-4^3m-lMI^-^Mi^¥M,JÜfâMfc*.__________.

13.fflctàb=ab2-2ab+b.$D:2-fr(-3)=2X(-3)2-2X2X

(-3)+(-3)=27.fôjglltfë5'4tfô(1-3x)☆(-4)=.

14.«iMWMI700AWÆfiOO(M),A,B,c

A.

15.50%Js»,JSS1ï0«gcW6Ü8ÿrMHi«,WlU9607ÊgHhÜl!fâ

__________.

16.-Mÿg2,1,2,5,3,2.

H,^T^®(*A®£8/>®,£72#)

17.(8#)->bft^£â<J3fêkt'ÈÈ<J#£/blO°,

18.B&:AB//CD,J&£PA,PC,tffâKZAPC^ZPAB>

ZPCDZ^^M^,#WÈ.

SQ-2

M:(1)ZAPC^ZPAB.ZPCDZ^m^A;ZAPC+ZPAB+ZPCD=360°(^

ZAPC=360°(ZPAB+ZPCD)JRBPR]*)

SÈ:M®-2,&&PftPE//AB.

VPE//AB(ft®),

.'.ZPAB+ZAPE=180°(),

.’.AB//CD(&Ü)

PE//AB(fr®),

.'.PEU(),

:.ZCPE+ZPCD=(),

.'.ZPAB+ZAPE+ZCPE+ZPCD=180+180°=360°

X'.'ZAPE+ZCPE=ZAPC(Æ,

:.ZAPC+ZPAB+ZPCD=360°

(2)M®,ABUCD,'^PA>PC,(1)âW^etfë,œ

HZAPC^ZPAB.ZPCDZ.^^'Z^.^,

(3)M®,ABUCD,ZABP^ZCDP^^^TJ^P,,^ZP{=2^,*ZPfàfê$L,«S

19.(85»W,BfoW.Dülâ,

(1)W^CD-,

(2)MâtAB;

(3)T&&DA,Xfâé&E,®&AE=DA.

•D

B'

20.(85»+

(1)Ml,%ZBOD=25°,$AZAOC=°;%ZAOC=125°,^ZBOD=

(2)M2,%ZBOD=50°,WZAOC=°;^ZA0C=14O°,$AZBOD=

(3)fêfëZAOC^ZBOD(DMHÈ.

21.(85»

B&A=3a2b-2ab2+abc/b«Wtë“2A-B2A+BC=4«2Z>-3ab2+Aabc.

(DBKrêM

(2)WWSÈ.

(3)^a=|,b=-,

85

22.(105»

4x0+1=4x1-3;

4xl+l=4x2-3;

4x2+l=4x3-3;

(2)MM

23.(10#)Wtt«H^807ü,IWWMÆ,IWfàg/’M

ffiOmW&PWBÆW

fë20H,FW*#(*A#20).

(1)

(2)(ffl^A'ÈÜ^^)

(3)£-r=100ttf,Wm

(4)^x=100fft,

».

24.(12#)M,&A,O,fiÆRJ-M»,OD,OE##JWZAOC^ZBOC.

(1)^ZDOEÈÜM^;

(2)$n^ZC(9D=65o,*ZAOEm&..

1>A

^gppl.

[WM]A.TMdll;«fêjmAWMiKtt,ÊJOttWW;

B.»AOM

C.7M»ÊWmffi.I^SkL^b,ÎO^S;

D.HWm»WftbEMM,

1M&A.

[Ml

2,D

[Mflf]1cm

[WMl1cm,

.-.<^-33cm,

X'.'*^-3xW^8cm,X

.’.ÿzFXK^ÆIM^Æ'f!Ü!l5cm&b,

.*.x=5.

D.

[£»]

3>C

[#tFrll<|a|<10,n^j«.^ÆnÔÜW,

nMOuâJM^fô£Ê$m<h

fiitf,n>W.

[WM]M:12500000001.25X1.

oc.

[ÛB#]

^ia^ra^^axlO"^^,X+l<|a|<10,n^»,

MM®aÔùawsn|ft<.

4'D

^5$=-2+(-5)+(+7)+(-9)=-2-5+7-9.

&&D.

IMJ

MM

5,D

[#tfflWj^ÆfôÆjOPRHW.

(OlA.OA#fà£it«$60o#|RbAO;

B.OB^|ÈlMffi15°^f|«J,BO;

25°#|RJ,CO;

D.0D^|RjÆm»45°#|ÊJ,BP^W^IR],îEfà

D.

[«]

6>B

[Wr]

[WJW;-19IWO--—.

19

MÆ:B.

[âSfl

7,D

CW)M;A.Ü5£=3x+6y,i&AO;

B.H^=-2a2,SfcBO;

C.HJ£=6X+4,i&CO;

D.-(3x-2y)=-3x+2y,1E®|.

[«]

8>D

IWM1M:A:âxffiyWüfflH,

B:Sf-â-W^xWy,âxflym»

C:

D:HJ'â’W^x^y,fix||«lWyKli^ftR,

D.

(Ml

9,C

[##fi&sij^jEffiw&?mwHPpr,

c

10,A

t#m«xio"m,x+axio's«MS.sfênms<æoæjæ«w,<n

LvÊM]159000000=1.59X10*,

ifelâ:A.

[«]

^ifi^iÉ^^^axlO"È9^,X+axlO",

«5®(*À®^W6/h®,««3#,#18#)

11,480

L#$f]i.x,X-LX+I.a

H,BPnrmssfus.

™M:WtO'MSætfjx.

yiJÆ'fêfê:(x-1)+x+(x+1)=14,

MW:x=8,

BP1ÈH^#»J>6,8,10,

10=480.

[Æffltl

12,1

CWMJÈJÜBÔJ&I:2m-l+3m-l=0,

m-.m=L

.’.2m-l=-2

1.

W^iEfôSrWtë».

13,-72x+20

[#tfflftfœSWb,a*b=ab2-2ab+b”,MZW.

LWMIom

(l-3x)☆(-4)

=(l-3x)x(-4)2-2x(1-3X)x(-4)+(-4)

=-72x+20

72x+20.

14,1

r^-tfrlH^TH^AM^^^d-38%-40%),

[WM)M:700X(1-38%-40%)=700X22%=1(A)

1.

[»]

360°Kht.

15,1JG

tÆW0^TOOx%,(1+50%)X7Ê,^»ÛÜ8ÿfttSHj

W,J5IJWM:Wx80%,«ig^@^“«#^9607G^Hl”nI^g:(1+50%)xx0.8=960,

[WJA?:OftHgWOxjü,fêigJOff:

(1+50%)xx0.8=960,

fëfâhx=l.

17Ê.

1%.

[Æffltl

w,fftra,d«

ïï#tt);WffrMâMfrxTO.

16,1

[##f]

[W1ÆW1,bb5,3,11HdïÆT3&,

b

H,£72#)

17,j£#£K)®M50o.

LMflrl

(W1M:^îÉ^ÆâùM>x°.

ÈSift,W3(90-x)+10=180-x.

mx=5o.

i«]

,»S-7ü-^S6WS>«™£^.

18,(1)ZAPC+ZE4B+ZPCD=360°,SÈW^FT-,CD,

180°,MÉWFfî,(2)ZAPC=ZPAB+ZPCD,8ÈOW;

(3)ZP=56°.

[^tffl(l)»(D,ÜâP^PE//AB,BPnIW?iJZAPC^ZE4B,ZPCD^m^A^;

(2)iiÆPftPE//AB,BPnr#tBZAPE=ZPAB,ZCPE=ZPCD,j£WW?!l

ZAPC=ZAPE+ZCPE,gpnIWï!jZAPC=ZPAB+ZPCD;

(3)

[WW1(1)ZAPC^ZPAB>ZPCDZlW^^:ZAPC+ZPAB+ZPCD=360°

(^ZAPC=360°-(ZPAB+ZPCD)R^^^5£JEWPRT)

SÈ:M©-2,lïâPWPE//AB.

VPE//AB(^S),

.*.ZPAB+ZAPE=180°(WJSWF?T,

•.•AB//CD(Bfcl)

PE//AB(WS),

.-.ZCPE+ZPCD=I8O°(M1:^TO,

ZPAB+ZAPE+ZCPE+ZPCD=180°+180°=360°(^fi4t^)

XVZAPE+ZCPE=ZAPC(Æâ<J^),

ZAPC+ZPAB+ZPCD=360°(^<f^^)

(2)ZAPC-^ZPAB.ZPCDZfB]^^>;ZAPC=ZPAB+ZPCD

SÈ:Ü^PWPE//AB,

.-.ZPAB=ZAPE(MjOIW,

VAB//CD(Bfcl)

PE//AB(WS),

.•.ZPCD=ZCPE(ffijOêTO,

VZAPE+ZCPE=ZAPCCfê

ZAPC=ZPAB+ZPCD(^>^)

(3)ZP=56°.

SÈ:M®,

:.ZPBA=2ZP\BA,ZPDC=2ZDC,

:.ZPBA+ZPDC=2(ZP}BA+PxDC)

È(2)W:ZP=ZPBA+ZPDC,Z=ZABP,+ZCDP{

ZP=2(ZP}BA+P\DC)=2ZP}=2x28°=56°

19,(1)WtJf;(2)MW;(3)MW

[#wi(i)

(2)fëJgSÊJmÆXSÎSW;

(3)^DA,fôMA£=DAgPnT.

[MlM;(1)OH£CD,

(2)M^ABBP^J^;

(3)^DA,^AE=DA,DAAEBP^W^.

20>(1)11,1;(2)130,2;(3)ZAOC-^ZBODS#,SÈ«.

[##T](DfàfâZAOC=ZAOB+ZCOD-ZBODnJ^Jî+MHiZAOC>ZBODfàfë

&;

(2)fàfâZAOC=ZAOB+ZCOD-ZBODlffîM;

(3)ÈZAOD+ZBOD+ZBOD+ZBOC=180°j=LZAOD+ZBOD+ZBOC=ZAOCâf^^^.

[WJtë:(1)^ZBOD=25°,

VZAOB=ZCOD^90°,

.’.ZAOC=ZAOB+ZCOI)-Z«WJ=90+90°-25°=11°,

^ZAOC=125°,

WZBOD=ZAOB+ZCOD-ZAOC=90°+90°-125°=1°;

11,1.

(2)^ZBOD=5()°,

:.ZAOC=ZAOB+ZCOD-ZBOD=M°+90°-50°=130°,

^ZAOC=12°,

Æ!|Z«00=360°-ZAOC-ZAOB-ZCOD=2°-,

130,2.

(3)ZAOC^ZBOD^.

ZAOD+ZBOD+ZBOD+ZBOC=180°,ZAOD+ZBOD+ZBOC=ZAOC,

:.ZAOC+ZBOD=IM°,

BPZAOC^ZBOD^Lft.

[^0t]

21,(1)-2a2b+ab2+2abc;(2)cSÉJOW;(3)0.

[##T1(1)È2A+B=CB=C-2A,&C,AB;

(2)fêA,BTCÀ2A-B,

(3)^a,bfômWPC

[W1W:(1)’.’2A+B=C,:.B=C-2A.

B=4a2b-3ab2+4abc-2(3a2b-2ab2+abc)

=4a2b-3ab2+4abc-6a2b+4ab2—2abc

=-2a2b+ab2+2abc;

(2)2A-B=2(3a2b-2ab2+abc)-(-2a2b+ab2+2abc)

=6a2b-4ab2+2abc+2a2b—ab2—2abc

=8a2b-5ab2-

(3)=6=(2)tfifjœ,

o5

Sa2b-5ab2=8x(-)2x1-5x-x(l)2=0.

8585

[»]

22,(1)4x3+l=4x4-3,4x4+l=4x5-3;(2)8073^.

en

(2)Wn=2019ftÀvmBPôT.

(WJ(D@:4x3+l=4x4-3,

(S):4x4+1=4x5-3;

4(n-l)+l=4n-3,

2019^®^;4x(2019-1)+1=8073^).

[ÛB#1

1600,%<60

23,(1)(2)(1440+3.6X)TG;(3)(4)20M3$æ,

1360+4x,x>60

»60MW,MJHfô#M®lî^40>blW,^W^1744TG

(2)aigJO,^HiR^BPnl;

(3)&X=100WftA(1)*n(2)[W&ï^,SPW^T;

(4)ïOi&^®J^20M3#tâ,^^^®^40>