阿里市重點中學2023-2024學年七年級數(shù)學第一學期期末學業(yè)質(zhì)量監(jiān)測試題含解析

2023-2024

1.￡WF,#±?WêBW^.4mE^5WW&,WmiWSWEM

2.

4.^fflRT^ffl^?Hi,

5.^#r>,#?,>1E^,giJMZlo

-,&M:$<b?3#,^36^.??/bmt￡iatiE4'M+,MW-Mft'é?SMJm

1.WIM1()

A.x2+x2=x4

B.2a-3(a-2b)=2a-2>a-2b=-a-2b

C.3x-2x=l

D.x2y-2x2j=-x2y

2.BfflMB,C,D,EfWSWtfr^,T^tè+Om?()

A.ZAOB=130°B.ZA0B=ZDOEC.ZDOC-^ZBOES#D.ZAOBZCODSL>

3.a^^>4><W^259?,￡è‘W?WM53?,

A.259=3(53+x)B.259-x=3x53C.259-x=3(53+x)D.259+x=3(53-x)

4.Oü4^?^-

()

+0.9-3.6

B.

-0.8+2.5

5.e&?-M'^?|x-3|+(y+4)2=0,(x+y)20206Wa()

A.1B.-1C.2020D.-2020

6.&AABC+,AB=AC,ZA=40°,ABAB￡D,^AC^&E,T&&BE,^ZCBEfà

A.30°B.40°C.70°D.80°

7.ié?^J^3cm,5cm,7cm,9cm(<M^)

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

8.M,ffl^b+ca=()

9.^A?W<^tU607üè9?^Tffi>bi+?^,?+-?720%,$-^vT20%,()

A.BT57GB.VT257üC.BT25%D.vT5%

10.%ABC^=^ma,b,c,K(a+b\a-b)^c2M()

A.AFCWt?xOB.

C.bfà??fàbjMD.

11.2019,M?èMfcê()

I

A.2019B.-2019C.2019^-2019D.----------

2019

12.BftR^5U+2ya<J?3,WW&??2x+4y+3M()

A.9B.6C.7D.

->ce?4#,m2o^,

13.M,AB//CD,^BED=11(),BF^^ABE,DFY^^CDE,JS!|ZBFD=.

14.W(n-4)?'-,lr-3x2>’-4x3+3>^A-,yfiWfcH?.WJ?=.

15.?2a+l-^2aSuffira,J?|?=.

16.￡2m-4-*a3m-.

17.?

18.(5#)

èùWW^.

<b￡$W￡80/n,<???^T5W

bt^THéh^m^^?Qm,??O,bt?B^TOT3W.

?Ef\^WW?:ièW^WA

?f;z-raw?:^a?J?6<JzK??^W.5^zK?20

4-zK#,Wl'n]^Wffi^^'ê-^?W^00aé.

19.(5^)uoxlWf?^tüWFW,K't’-ftS^J2O%,^-#v^20%,g?ia^#

20.(85F)M,￥ffirtW4sB>C>DH?.

(1)iTOUB,^BD,i￡&.BC-,

(2)M&AC,^^BD^-^E.

B*

I>

21.(10#)btfgj

(1)5a-(-3a+5b)

(2)4xy-(2x2+5xy-y2)+2(x2+3xy)M43x=-2,y=y

22.(io#)

?2x-3=6-2(x-0.5x).

—32.V-4,

(g)-----------------=1.

23

23.(i2#>

SB1

->fc#?:**S#12>b<h?,?<h?3#,4U6#.

1>D

[#tfrlA.

CX-a-^^^BPW^;

D.##R|^BP?T^.

[W1A>x^x^lx2,

B.2a-3(a-2b)=2a-3?+6/>=-a+f>b,

(X3x-2x=x,

D,jry-2x2y=-x2y,iO^?E0li.

?:D.

IMI

2,c

[MH?]è?OtHZA0B=50°,ZDOE=40°,ZDOC=50°,ZBOE=130°,f?tHZDOC+ZBOE=180°BPnf.

[WMJM;*.'ZAOB=50°,ZDOE=40°,ZDOC=50°,ZBOE=130°,

J.ZDOC+ZBOE=180°;

W&:C.

m

3>C

1

[W1WàZ^T,iü!l??4’S<(259-X)^ffi^,Z^MW(53+X)MS,

M&?ZLàW3BPnr.

LW]M:HiJ^>^?<(259-X)^fêM.￡#*Wf?(53+x)^M,

259-x=3(53+x).

C.

[?Btl

4.C

[WMlM:|-?.9|=0.9,|-3.6|=3.6,|-0.8|=0.8,|+2.5|=2.5

0.8<0.9<2.5<3.6

.?■AMM?W,§giSSlt&<J>-0.8.

me.

[affil

?SM?S

5,A

[^WlX,ytfjfé.Mftà^MW.

[WM]M:y^??|x-3|+(y+4)2=0

/.x-3=0,y+4=0

.*.X=3,y=-4

(x+y)2020=(-1)2020=1

i&ia:A.

IMJ

6.A

IWJèWAABC+,AB=AC,ZA=40°,BPnJ^ZABCtfjMtXé^StABfit1YWABfD,#

ACTE,KTWAE=BE,TOUZABE?.

VAB=AC,ZA=40°,

.*.ZABC=ZC=(180°-ZA)4-2=70°,

V^ABmf?ABfD,XACfE,

,’.AE=BE,

.’.ZABE=ZA=40°,

.*.ZCBE=ZABC-ZABE=30°,

rftfê:A.

[?]

7,C

m-.^3,5,7;3,7,9;5,7,

^3^.

fà&C.

8>A

[W)a.b.cM,BPTOtBa>b.cKtt,WHfWmppr.

[W1t?ha^-?xm,b^n-i>M,c^n-2*^ffi

4

1

.‘.a=4,b=-Lc=----

2

ifciaA.

(?Bf]

MlE^Wffi?üH^^W^

9,D

[M#f]Mt-.?mMmfiw.?ew^jm^e^w,stt^ttsswsi^tozfüi?fjM,

WW^MJêBW-

f?g:M:OT20%K?Wx%,VT20%?<J-4-m^y7ü,?^?nTW:

x(1+20%)=60,

y(1-20%)=60,

MW:x=50(%),y=75(7ü).

JBlJM-f#?f??fll=50+75=1257ü,Mybi+￡#f?WJtHn=60+60=120jü,

ap^?iè^^^vTSTü.

tifaD.

10>B

[^IKT^a^b^c2?,^a^gièià,

[#M1V(a+b)(a-b)=c2,

.'.a2-b2=c2,

.?.a^<-feià,

A&a?m

t&j&:B.

Laffi]

11,c

[#M1^|x|=2019

.’.x=±2019

C.

12,A

[#ffi]ftx+2y=3%fà-^&ft,^JS^\M2x+4y^,*JH?RW.

[WW]W:è?B:x+2j=3

.’.2x+4y=2(x+2j)=2x3=6

.*.2x+4j+3=6+3=9

A.

[?]

-,??4#,^20^,

13,125

[Wfl?]EWEM//AB,ü￡FWFN//AB,èAB//CD,BP?]WEM//AB//CD//FN,

W,éZBED=110°,BPnT^ZABE+ZCDE=250°,XèBFY^ZABE,DF^^ZCDE,tlJS?

BPnT^WZABF+ZCDFMM,BPRT^ZBFDWM.

[WW]EWEM//AB,MFWFN//AB,

AB

c--------------------

VAB//CD,

.'.EM//AB//CD//FN,

ZABE+ZBEM=180°,ZCDE+ZDEM=180°,

ZABE+ZBED+ZCDE=360°,

VZBED=110°,

ZABE+ZCDE=250°,

VBFT^ZABE,DF^F^ZCDE,

1I

ZABF=—ZABE,ZCDF=-ZCDE,

22

.?.ZABF+ZCDF=-(ZABE+ZCDE)=125°,

2

VZDFN=ZCDF,ZBFN=ZABF,

ZBFD=ZBFN+ZDFN=ZABF+ZCDF=125°.

125°

w.

14.-2

[Mflflm$g?j￡P(guān)JWn-4#,|n-l|=3^W^M.

[#M1M:?.?(?-4)xM/-3x2y-4x3+3>^Tx,yfiWfcim

.-.n-4#),|n-l|=3,MMn=-2

-2.

[?1

?JSWWMM?^?^a￡^?I^W,MfHnM,

1

15.

4

[#M1M:t?OtM:2a+l+2?=0

m-.a=~—

4

--

4

[?Btl

16.1

(WA?)è?BRT$?]:2m-l+3m-l=0,

MM:m=l,

.'.2ni-l=-2

b

b

Laffi]

M?a<J^êiE^SM￥^?aüè5C,

17.(^W-)

t?fêHt?miWa,Min,HléttW?ME?,H^ttW9^^WtH-^BPRl.

[WMJM:H?

[?]

AWSIWMIê*,mWfàimBm

H.W^?(**?#7/Js?,

18.(1)?èH^|H)^aü^^>(5m-7)￡;(2)??^lm:(3)?—'NKJfS40?ü,-^ZKMSTü;

[#tffl(i)Min,BPR^IW

(2)Mljmxm,BPRTWiH^Txai-Tü-ft^fi,WZ

appTWtB^iù;

(3)(D?fc-^Oixjü,(48-x)TU,^?B^SaiWBPWW^M;

ttgJBPW^ft.

[WW](1)W:?.?/J>m^tt/b0^W^W2fê/h4^>

.?./MEftlW^(2m-4)?.

XV/bWWHi/baElWMf?*I

(2m-4)+1](^),?

m+(2m-4)+[(2m-4)+1]

=m+2m-4+2m-3

=(5m-7)

(5m-7)?.

(2)W:^WSlJ?Mxm,

?*-a-a=‘-

W^:x=l.

^fè^?^lm.

(3)^bzKMx7ü,■?bTk^F^I(48-x)%,

aiSSiO:3x+4(48-x)=152,

WW:X=40,

WJ—bzMS407ü,—4-ZK#^87G;

(40x5+8x20)x80%=288(Té);

ZW^flf5x40+(20-5x2)x8=280(?￡),

V288>280,

[￡?]

19,v^Tio%^.

[4X1ma??üww^x%,?RMBPRI.

tw]vwrawjy?,

W:120-x=20%x,120-j=-20%j,

MW:x=100,y=150,

.'.120+120-x-y=-10(7ü).

^Tio?^.

[?J

20,(1)W#T;(2)WtJf

[Mtfrl(DHOAB,ffl^BD,UlB^MlèiBD^IêJJ?-léM^BCBPnl;(2)gg&a,K

E.

[W3M:(1)aW/f,M^BD,&&BC.

(2)OUC,iOlJ?E,

4*

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