陜西省山陽(yáng)縣2023-2024學(xué)年七年級(jí)數(shù)學(xué)第一學(xué)期期末經(jīng)典模擬試題含解析

E?WLJJBBM2023-2024

3.^^Js,M^&lêl.

-,&&?(?/b?3#,^30#)

1.ttST?

m?üM()

A.8000￡^￡>&&B.8ooo￡^￡0!lta^>&?-W$

c.D.80000

2.3X3èù^W^èù(W>ta

mfüT“M”aW#affl,?WWWtBPmSMêO

?P

A...B.;;c.:::D.??,

3.T^iJW-b,ra&ù^W()

(1)ABBA^RHOhl

(2)féiéMaêMNglJC

(3)J?-lé^aMNfljAfêNA=2MN

(4)

A.1B.2C.3D.4

4.M,?±&üA.b,ê.a+b<0,ab<0,W?O?ùf?S?()

B

JL

A.?AMiàB.M￡ià

C.A,JWJ?^AD.,4,JalWLàB

5.x?Wi^y^=lm^b)2,fl!)mèülli()

A.2.5B.1C.-1D.3

6.e^^x^^?^-2x3+*566^+9A-+l-(3ra2-5x+3)&üW^^x2?,()

A.-3B.3C.-2D.2

7.2’=2,22=4,23=8,24=16,25=32,26=64,27=128,28=256,22?20

)

A.2B.4C.6I).8

8.2019^10^,

?#70°#|R],3B4ZAOB?WbM()

A.90°B.130°C.120°D.125°

9.^?2(x-3)-3(x-4)=50yr,()

A.2x-3-3x+4=5B.2x-6-3x+4=5

C.2x-6-3x—12=5D.2x—6—3x+12=5

10.150000000km1.B“150000000”ffl^4^ia^^^()

A.1.5xl08B.1.5xl07C.1.5xl09D.1.5xl06

a$?C￡*??W6<NB,</h?3#,?18#)

11.^-^W3fêttiè^mbA2fê?10°,.

12.JWs?rOMl,$WW20jü>i&WJOj?ùr?*

titftx?t,.

13.___2017^5^180,

16000

______

14.Ep>Z1ffiW^fi>?#^20?-9^,*.

15.a,bim,mija*h=a2-b2?2*3=-5,?^1+?2*(-5)=.

16.$n?,

^2020aü^?^4f,f&I.

H,#72#)

17.(8#)$ns,ZAOC^ZBODMM.KZAOB\ZAOD=2:11.ifrZAOB.ZBOCftiBffi..

18.(8#)M,AB//CD,Z1=Z2,j￡?:AM//CN

19.(8#)M,Z1=Z2,ZBAC+ZDGA-\SO°,ZBFE=IOO°,ZBDAWfi??.W^7&.

t?hZBAC+ZDGA=18(F(B&)

:.ABH()

.-.^1=^3()

XZ1=Z2(B^l)

.-.Z2=Z3()

.-.EF//()

.-.ZBDA=ZBFE()

ZBFE=100°(B&)

.-.ZBDA=.

20.(8^)OC.OCEOD,ffl&OE^ftZBOC.

(1)^Z￡>0￡=150°,^ZAOCèùM.

(2)%ZDOE=a,WJZAOC=.(?a?^)

21.(8#)

WMSWWf??:

A:KUnSg^-fM?

B:wsnmrnB

C:

D:￡ilfM?

^io

(2)#^^??;

O?^Wi+S^,

22.(10#)WWT45°,BP^|Za-Z/?|=45°,WJ^Za.Z/?

5A￥￡A.(&:A?4’W?ê?BA#0oK/>Ti80o&<j?)

(I)Mi,feAWK-ABCD?<Af/v?ra(^A/?^?AD±,^/va^g?±)f??D&aaD'&,

^ZA?WD^ZDMW5A‘WM^r,^ZDM/V?ùM;

(3)?(1)f?&ftT,PM?fa(APOSBC±),?A,B'&,Ml.^ZAMP

&ZDMN3Z5°,

W:R&,?!

W:R^,?,TOW

24.(12#)??12^3P^,5&￡lW&*37￡.

(i)M____2fê.

1>B

BPWtti=W.

[#JS]80000xl0%=8000

A.

B.1E^:

C.

D>#*^>>8000,$g?￡.

B.

??;*?>.1WM

2>c

[#tfrl^èTft?x,?§-f?>M

[WJW:WA?x.PftWèüa^P

.‘.x+l+P=x+2+5,

Wp=6,

tifa-.C.

r?i

?^￡T<Wf?in&,

3>A

^-.(1)?ABBA

(2)

(3)Wfé-K^gMN?I]AfêNA=2MN,W^jEfà;

(4)

^±P?^R<(3)jEfà.

?^iaA.

4.C

rwimis?^?è<i^^^MWM5c^tH^??EPw.

[W]-:ab<0,

;.a^b

Va+b<0,

.?.M?Of?t?S??.?M^ZI’HJ,KBMA.

c.

[^0f]

5>B

4—m

[?WflèB??—=1,t?Wm=l5ift&B.

6>D

LW1^TO^4x^^?0BPnT^iJa?<j{t.

[WJ$?;-2x3+6x2+9x+l-(3ar2-5x+3)

=-2x3+6x2+9x+1—3ax2+5x-3

=-2x3+(6—3?)x2+14x—2

’.'^fx-2x3+6x2+9x+1-(3?X2-5x+3)x2?,

.*.6-3?=0

a=2

w.

La0f]

7,C

ffi20201^^4,iEM^,BP?Hi2M2?.

[W]??:4.8>1,

V20204-4=505,

/.220M24R,1.

?:C.

[?]

8>B

rwi^iJ??oaEjL?O?m;Wtf±Wc>D,E,Wé^tHZAOD,BPTOLHZAOB.

[WJM:￡nTS^,c>D,E,

ZAOC=70°,ZBOE=20°,ZDOE=ZCOD=90°

ZAOD=ZCOD-ZAOC=20°

ZAOB=ZAOD+ZDOE+ZBOE=130°

f?i&B.

9,D

t#wi?ig￡fé^ojis￡BPRr.

[OP]?■.2rf?2(x-3)-3(x-4)=5￡fé#1f:2x-6-3x+12-5,

D.

[?Btl

“+”04,i?t?w?t?ma-”

ut,

10,A

rmir]W:l<|a|<10,nf?Ma

Itf,nêOl;

<104,n>?.

150000000=1.5xl08,

A.

?Zf4^TS^?è?^^axlO"?ù^,l<|a|<10,^04

atfHè&LRn|${t.

Z,?/b?35>,?18#)

11,70°

CW)?^A^x,??Bnr^:3x=2(180-x)-10,

mx=7o.

12,(l+30%)x-80%-x=20

LW1207ü”RL

rwiwsw,

(l+30%)x-80%-x=20.

;(1+30%)x?80%-x=20.

[?]

13,1.6X104

[?Wl?4^ia?a<J^m^axlO"è<J^,#*l<|a|<10,n^W.fafen?,

a^^OlW,ni?B;

n??.

16000=1.6X104,

1.6X104.

14,1.

[W120-(-9),M^<S?MvèOJaWMBPRl.

[WlM:20-(-9)=20+9=1,

1.

[am

15,-21

rwi

[WJ':a^ha2-b2,

.'.2*(-5)=22-(-5)2=4-25=-21;

ite^?-21.

[a?]

16,4584

[W1éJOinTfci?11,2,3,4;$305,6,7,8,9,Hn

M?WMWn-l,

re?i??=ii

^2<2349(94-3=3)

^3<5678935(354-5=7)

1011121314151691(914-7=13)

^5<171819202122232425189(1894-9=21)

M?f?mf?4?j2n-1

V^44tTaù^M^J1936,1145^^^^2025

.'.2020^45<(452x45-1=89?

2025-2020=5;89-5=84

Sllt,202045<84Wfi.

H,^72<)

17,ZAOB=20°,ZBOC=70°

[^1fàfèfa%?ZAOD=ZAOB+90°,ZAOB:ZAOD=2:\1BPnJ^HiZAOB^R^,

ZBOC=ZAOC-ZAOB^^.tü^.

[W]ZAOD=ZAOB+ZBOD,ZBOD=90°

ZAOD=ZAOB+90°

XVZA0B:ZA0D=2:?l

ZAOB=20°

ZAOB+ZBOC=ZAOC=90°

:.ZBOC=ZAOC-ZAOB=90°-20°=70°

[￡?]

18,wjBjm

[W]KMMZEAM=ZECN,

[W1CT:VAB//CD,

ZEAB=ZECD,

VZ1=Z2,

ZEAM=ZECN,

/.AM//CN.

[￡?]

?W1M.

19.DG;^^ASIb,WMW;V?WMT,iWmWft&;MMTO,

ioo°

[W]M:ZBAC+ZDGA-180°(B&)

:.ABHDG(EOgftftSjb,??W)

:.z\=z?>mwg,ftftftffig?)

XZ1=Z2(B&1)

.'.Z2=Z3(W&)

:.EFHAD(HQMWA^￥4f)

:.ZBDA=ZBFE()

ZBFE=100°(Bft)

.-.Z3DA=___1(X)°.

[am

20.(1)ZAOC=60°,(2)360°-2a.

rwi(I)M^MW?X^?W^^^nr^zcoE,è^Y^WMWZBOE,

BPRT;

(2)??SM^?X^??ù^^^M?rWZCOE,è^Y^mmLffinJWZBOE,M^Jffl￥?f?￡X$?nT.

[W1??:(1)'.‘OCEOD,:.ZDOC=90°,

VZDOE=150°,:.ZCOE=ZDOE-ZCOD=150°-90°=60°,

OE^FfrZBOC,:.ZCOE=ZBOE=60°,

:.ZAOC=?80°-ZCOE-ZBOE=W)°-60°-60=60,

(2)‘.‘OCEOD,:.ZDOC=90°,

VZDOE=a,ACOE=ADOE-ZCOD=a-90°,

OE^ftABOC,:.ZCOE=ZBOE=a-90°,

ZAOC=180°-ZCOE-Z?OE=180°-(a-90°)-(a-90°)=360°-2a,

360°-2a.

D

[?1

21,(1)1000A;(2)OW;(3)54°

rw](I)

(2)

(3)BB

[WJM:(D400-r40%=1000A;

(2)1000x20%=200A,

1000-(250+200+400)=150(A),

1000

.?.a^vf-04’,B^r?èùJ?^@l^?aü??54o.

LaBf]

?gti+S,

22.(1)35°§￡115°;(1)45°^75°;(3)10°§￡130°.

[W1(1)$ZAimWI!t?x°,

(i)^ZDA/2V*X°

(3)WH??:?^Z￡>M/V=45°Bt,ZDM￡>'=90°,ZAMP=50°,ZDMA'=8O°,M

ZA'MD'=ZDMD'-ZDMA'I^^D?.

?%ZDMN=75°0t,ZZWD’=150°,ZAMP=80°,ZDMA'=10°,tg?gZA'MD'=ZD/WD'-ZDMA'i+^gpRT.

[#M](1)&ZAW￥￡?WM?x°,M?^W:

|80°-x|=45°

80°-x=±45°

.*.x=80°±45°,

.’.x=35°§￡115°.

(1)T￡ZDMN$)X°,W?faaùtt?WS!lZn'M^=ZDM?V=x°.

.’.ZAAfD'=180°-lx.

VZAMD'^ZDMN

|180°-lx-x|=45°