貴州省黔西南州勤智學校2023-2024學年數(shù)學七年級第一學期期末監(jiān)測模擬試題含解析

2023-2024

2.?M&WfflO.510^2?^,*#Zê,

4.*Ora,>U$JM7J?

-,^?#i2>Nb?,</b?3^,&36#.a^/bs&Hmra'Nfcw,RW-?^?0S^W.

1.￡x-y=3,Jü!)??4-2x+2y?<J?()

A.-2B.-3C.6D.10

2.^?^?P*?1é2O^*,JW^?1.27üW,^ü20^M?a:

T^SIE^M()

A.1.2x20+2(.x-20)=1.5xB.1.2x20+2x=1.5x

1.2+2

C.-----------x=1.5xD.2.r-1.2x20=1.5x

2

3.x+y,x2-y3,x3+y5,x4-?,-,M^IO^TX)

A.x'°-y19B.Z’+y'9C.x10-/1D.x10-/7

4.M#f^:??MWHa,f?WAB=4M*,5C=2M*,fc>0?ACm

&?3()

AOBC

A.0.5M*B.1?c.1.5M*D.2ffi*

5.?#>?^135%,&+-'(WJ25%,

*25%,)

A.B.?9%C.M187üD.B18%

6.&2639=2xl0’+6xl02+3xl0'+9,?MfflW10^^(1è

CM?):0,1,2,3,4,5,6,7,8,9.i+WlM^m+A?M16?1Mi+M,^ffl?0~9^*^A~

F#16M+?#,

+à?0123456789ABCDEF

+S$lJ0123456789101112131415

71B=7X162+1X16I+11=1819,71B1819.+à?fW&1D9

??()

A.117B.250C.473D.1139

7.T3rij^4>,<)

A.2m+n=2fmB.21a+5=26aC.-2(x-4)=-2x+4D.2-3a=-(3a-2)

8.^Z4OD=18°,()

A.162°B.142°C.172°D.150°

9.M,&?QOtfy￥&OA=6,ZAOB=90°,WJ(90°f?)()

B.9?rC.12TTD.15TT

10.^￡^x3-y3+3xy-5xy2&xm?^JM>()

A.-y3+x3+3x2y-5xy2

B.-5xy2+3x2y+x3-y3

C.x3+3x2y-5xy2-y3

D.-y3-5xy2+3x2y+x3

il.()

A.|-3|B.-5C.-(-2)D.-

4

12.WiéOèt?()

A.B.

C.,^BC=ABD.W^OB=3M*

W20#,

13.dsdWBH!la+b+3cd=.

14.12^-w,?

15.720000￥#*,M720000ffl^?

___;

16.M,MJO3

?jm?imm24?......W?fê.

SiW*2*5■??^

17.io%,mi￡XA?HW￡

______±.

=,?g?M)

18.(5#)M,B&hADIBC^D,EG±BCTG,ADTOZ5AC.

TffiW#fêSii8,tMè?sè.

üEB^:VAD±BC,EG±BC(B&),

A^ADC=^EGC=90o(MM^X),

.’.AD//EG()

.’.Z2=Z1(),

Z3=().

XVAD￥5>ZBAC(B^I),

.-.^2=^3(),

/.^1=^E()

19.(5^)

?DSI/‘W(#01)'K

'à-^-àTWZ4ao9?-M^?CHW

‘x^NOT‘W^-Br^SXW^-WfiK^^-felW-Mfel’Z'à‘^oor(#8)’QZ

8^|xx|O

00Uqc-i

0Iz-qq+u

WWW??nmflm&LaWm(O

O

00*zZ-

0Z?-MII-x

!(W*IèdObk)(3)

I0?-0

00i—p-Z

‘tWWfWW^W(I)

iW

ZII00000

ITP

HJ1n1

I-Z-ftI-■kZ-00

(1)%ZABC=50°,ZACB=60°,JfcZBOCf?ftHh

(2)^ZBOC=130°,Z1:Z2=3:2,^AABC.ZACBfàfê&.

22.(10#)?W4t^lRj?i5i￡fé±Si?,

(J￡&:#*)WWJ?:

-38-9+10-2+12+5-7-11+5

(1)

(2)?^7^?5>0tl?75jà?S?

(3)^HMOhO.3#,?5TK?è?H6.57ü,

23.(12#)i+W?

27

(1)42X(--)4---(-12)^(-4);

<?(-1Px(^-l]-(-3=)-|-l-5|.

(1)2x+5=l(x-l);

(4)4-^-!-=6X+1.

2

->??12#/J^,?/h?3#,

1>A

t#Wl^4-2x+2y?^4-2(x-y),=

?M]èTOf:4-2x+2y=4—2(x—y),

Vx-y=3,

4-2(x-y)=4-6=-2,

A.

2,A

iimi.5jü??”w,^fflzK*xjt^saT2o±^,g?^(x-2o)

IO^ZK^è12x20^2(x-20)MWm,1.5x,nf

1.2x20+2(x-20)=1.5x.

1M&A.

3.A

[##r]

[WJX2,X3,X4,...?X",

^ZOftly--y3,y5,-y7,...,(-D^'y21”1,

lO^^BPan^OBt,

xn+(-l)n+ly2n’1=xlu-yI.

A.

[?]

4,B

^S±PT^M?<]WH1OB?ù-fe?.

[OP1W:

42

33

AC=AB+BC=6,O^AC^^,

,-.AO^OC=3.

BC=2,

:.OB=OC-BC=\.

tfà&B

[?]

5,C

[#tfrl

JüIJnr^^fg:(1+25%)x=135,

x=108,

tt&rm,3MWT27?;

(1-25%)x=135,

m-.x=i8o,

tt&’OT’fT45TC,

45-27=18%.

M:C.

r^m

6,C

[Mtf?]é+à?$iJW4t^+?$'Jaü^?i,BPRT^?ü^.

M;lD9=lX162+13X16+9

=256+208+9

=1.

ifeia:C.

[?Btl

7.D

L5>tfr]^-^^?^?TBPPI.

A>2m?n^MIW^>

B,213^5^15)^,

C,-2(x-4)=-2x+8,

D?2-3a==-3a+2=-(3a-2),

?D.

[?]

(?)0??>F*.

8,A

r^WlaPTOM.

[W1vZCOD=ZAOB=90°,ZAOD=\8°,

.‘.Z?OC=ZCOD+ZAOB-Z4?￡>=90°+90°-18°=162°,

A.

ra?]

9,B

L^tfrlMWffim^i+WBPnT.

OOTFx6~

??:IH'W^90"f?jOAOB6<jS^=JU?°=9^,

360

iftiê:B.

[?]

10,D

8xf?WA*?^JBPnT.

LvlW]M:Vx3-/+3Ay-5xy2=-/-5xy2+3x2j+x3

Ax3-y3+3xy-5xy2xèù>:-y3-5xy2+3x2y+x3.

ifeia:D.

[?Btl

11,B

[3X1omiiM,

A,|-3|=3Mü(,

B,iftBiEfà;

C,-(-2)=2*iE^,i&CSHg;

D,-&?,feDO

4

Wfc:B.

M

12,D

[##r]ma?TOI?

[WA?]A.IEf?,

B.M,

C.jOc^ASMC,^BC=AB,?Efà,

D.WM%OB=3&*.ew,?m

Wfc:D.

[as?l

SA??MA???ü^,

-,?S?(??4￡,Wfr20#,^^±X??^±)

13,1.

[#??]??;Va,.*.a+b=0,’.’c,dZL^f?iJIfc,.*.cd=l,.*.a+b+lcd=O+lxl=l.

^^1.

[?]

14,96°

w.

[WA?J'.'360°-T-60=6°,

:.(12+5)X6°=102°,

o12

V30°X—=6°o,

60

102°-6°=96°.

96°

[?]

15.7.2x105

m^WW^axlO'l<|a|<10,n^J?.n?,g?Mallt,

?wmna<jwa^/j^^??ü?ffiR].ni?;

n<?.

[WM]720000=7.2x105

7.2x105.

[?i

16.1

[WJ??W:Jg->b?^W4X(1+2)M=W<4X(1+2+3)fg

?W#WM.

[WM1M:?fflW:

^->baMW4xim^,

^-^S^W4X(1+2)

MH4WW4X(1+2+3)

^ra^@^W4X(1+2+3+4)tg^,

4X(1+2+3+...+10)=4X(1+10)X104-2=1.

1

[?)

f?jggg

17.1.1m

[##ri

[WM]M:è^jtnTW.

m(l+10%)=l.lm(5;),

1.1m.

[?]

18.?WSêWT;ffil?ZE;M^W,?Y^W?X;?

W.

[#fflWYM&ù?X.TO?êW.A￥^aù?XiU^*K^^TM^BPnr.

CW)M:VADZBC,EGZBC(B&),

.’.Z'ADC=^EGC=90°(Mf?féX),

/.AD//EGOW)

?*?Z2=Z1(OMrtet?Wg),

Z3=ZE?WHT.

XVADT^Z5AC(B^n),

.-.^2=^3(?Y^W?X).

.*.^1=^E

2

19.(1)%—ff:1,-6;^~^f:h-5;(2)x=-(3)2a+3b=l.

3;

r^tfrl(I)^Jg^-^-W2,^-^-?6BPW^5

(2)Wi2X,2,(l-2x)nm^rg

(x+1)-(l-2x)=2,^gBPnlWM;

(3)a,^Z?^-j!]±é<J^W*(l-3b),(b-2-a)Ri

(2)#:

x-ll-2x

-21

2,W:

x+1l-2x

11

(l-2x),W:

x+l-(l-2x)1

11

.’.(x+1)-(l-2x)=2,

MW.x=|;

3

(3)a,W:

a+bb-2-a

l-3ba

a+b-(l-3b)b-2-a

11

(b-2-a)

a+b-(l-3b)-(b-2-a)1

11

.*.a+b-(l-3b)-(b-2-a)=l

^SW:2a+3b=l.

là?]

20.EFf?&K?sMh

4T,160fcl>￡s?±q?-&”,BPnTWiü^x,yK~7ü-^M,MZBPRTWltié?i?.

[WS?M?xW,Z-?W^yX/#,è?M:

32(x+_y)=400

160(y-x)=400

x=5

_

b=7.5c

&■■Z,WJèM7.5W.

21,(1)ZBOC=125°;(2)ZABC=60°,ZACB=40°.

[W](1)è^Y^Wtt^nr^HiZOBC,ZOCB^ra,MlgHWrt?OT

(2)èW?Wé5CW^HjZl+Z2=50°,SfêfêZl:Z2=3:2fiPW#?HlZl^Z2|ftOl,

[WJ(1)H^jZABC^ZACBWY^BO^COffi^^O,

^f^ZEBO=ZOBC=-ZABC,ZFCO=ZOCB=-ZACfi

22

XZABC=50°,ZACB=60°,

WZOBC=25°,ZOCB=30°

WZBOC=180°-ZOBC-ZOCB=125°

A

(2)S^JZBOC=130°,

WZ1+Z2=5O°

H^JZI:Z2=3:2

32

^FfIjlZI=x50