深圳罗湖区五校联考2023-2024学年数学七年级第一学期期末学业质量监测试题含解析

2023-2024

i.Wffl2BWfflo.5am£fi$aômjmtt뱜æfê

2.g®w,U*W^«±ÔÙ«««»,

-,O&*:tt®U24vb®,</b®3#,

1.ffl0.05049,jfiWîl0.001()

A.0.0505B.0.05C.0.050D.0.051

2.

A.2B.1C.-1D.0

3.TffiTWiEfôâ9<()

A.-32=9B.-5+3=-8C.(-2)3=-8D.3a+2b=5ab

4.T?o^»,omx)

A.#n>X=J,=~^-B.ax=ay,ISPZx—y

a~a

C.S=ab,ffî&a=—D.5DIX=J,3P^.|X-3|=|3-J|

b

5.M,()

-t----»----?----

A.B.

C.»B^ACW»imD.|f^BCW^BAM|SJ-^M^

6.A«JlOM^lJB«,ttMBfêjOAfê/!>ffl3/]Mtf,zK^Z^fc/Bt,£A

SAiïflBWxn.nr^ltHW^S^:()

-V_A-

A.B.

28-242824

x+2x-2.x-2x+2

C.-------=--------+3D.--------=----------3

26262626

7.a&:M,ZA6>B=ZC6)D=90°,J1!|Z1-^Z2)

DC

A.5^B.5#c.D.

8.x=-1x2x-a=0ÔW,WJ«MJt()

A.-2B.2C.-1D.1

9.2(a-b)-(3a+b)()

A.-a-2bB.-a-3bC.-a-bD.-a-5b

10.()

A.-7B.3C.-3D.7

11.

13.SxBj,

2x-l

14.—4'Æôü^FÆin±io°jë,WJià^bÆ^_______°.

15.î#^Hi-^IWfôƱ&R^#WMïÇ

16.(l)T^JR^:®2x2+bx+\-,®-ax2+3x-,®—^—;®x2-,®Æ>.(«

x-2

(2)W±fflÔ<J®^(2)^ffiin,%a,bW^,WMMjmWfâ,*a,btfyfè

17.MiWWHM^2>b®^<14^/hlSl,

22>b/b[Sl,mW.M7^ffl»/bBPM»Æ

O

OOOO

oooo

OOOO

O

%31'lWtf

=>(AA»7/b®,üEBjag^«»B)

18.(55Ȯ4mMA<:I2xy+(3x2-5xy)-2(3xy+2x2)%*,x=2,y=^.

121

19.------------------------------------(55»(1)T+W:(----------)V(-—)+(-2)3;

2318

(2)MAS:2X-^-=-1.

2

20.(85»O’»TM^Æ$jBÈW^Wfêjm,mwTW^,^^«ôùwwfftrâ]X(M&:/JO

(1)»WT_6-8/hntziw_A,

(2)^WS+mæjmiE

(3)Wfôvt-Tgfé30006zbWKAÏfc.

21.(105>)Æ4tfê),x2+(-x2+3xy+2y2)-(x2-xy+2y2),M45x=l,y=l.

22.(105»MAS:

(1)8x-2(3x+2)=6(2)x-—=2-—.

;23

23.(125»aWJtEJMèn^«^507ü/A.ttSA

ï£$nT«:

Btru

we0

W010AIUT(â-10A)Siîio

AWH,^10AO®«,8ÿr.

(1)O^ffl«W20£i»£,mfiBWEW,JOJ&M^_TÜ.

(2)WfêfiOWf5£iH(TOS)^520H(«fiH)Aa>FnBWW»a&

A.BM«ffl-â-i+»A^50^,2000TE,«A,

->W®:*A®«i2^/b®,</b®3#,^36#.Æ^/b®£tüfôH4«+,

i>c

ie77W±ô<jW4^jH^sÀBPnr.

[WW]W:0.149MW,fihOJ0.001o.l.

M:C.

[£»]

WflMœ.-&<,fà,MJl/b

2,A

[#ffi]MI^TOÆJZWHIrnærôrgftmpnl.

[#W12m-l=3,

W^Sm=2,

$.&-.A.

[«]

3>C

[##fl

[WM1M:A>^=-9,«W-

B>-2,

C\JI^=-8,

D.3a^2b^>|âJ^,fô*i£13WL

Oc.

[âBfi

^STWSI&Û<J^ë»^#|s|^,âmiJIW^bm^WJWW»:

$W».

4,D

[#tff11:2:

(Btw>,ww.

LWM1A,a=OBt,MiàWLUa2,»5GfôAfé^lî

B,a=OBt,MW^a,i$Bféi£;

c\b=oft,MWKÆ>5Gi&cfêig;

D>#nJ^x=y,3P^x-3=y-3,#flU|x-3|=|3-y|,î&DïE^j;

D.

[«]

5>A

[WMlA,lEfà;

B,^aAB^S«A^|s)-^a.

(X

OA.

[^m

6>A

[^•tfr]«UAB«,Ü1IJÈBATOM7K»,26zKM^25^

M,26+2=28^/ftf,26-2=24^F-X/W.«“^mAWfîlt

iüBæ,kmBA3/JsBt”,&O<AwaBfêtfffflÔWIW='ÈÀ<B®M0A

fêlWl’0]-3'.bBt,

[WM]»:^A^B^ffiffix^,ÈBÜCW^g:

x_x

28”24

A.

[«]

+&KMi£zKmS=#zlCj£®-zm&£.

7,B

rawri36(FJIMT+MBPPTWM.

[WM]VZAOB=ZCOD=90°,Z1+ZAOB+ZDOC+Z2=360°,

.’.Zl+90°+90°+Z2=360°,

.*.Zl+Z2=180°,

BPZ1^Z25#,

W£B.

r^m

»36O°MZ1-^Z2

8.A

:.-2-a^0,

.’.a--2,

'&J&:A.

[â0#l

^«7-Æ-^gWM,Ÿ»7gW^.

9'B

[Mtff1OTW:

M;JMï£=2a-2b-3a-b=-a-3b,

ift&B

âW:W«7^^â<JiraM,

10,B

[W1M:a+2m$M-5

•••a+2=5

••.a=3

&&B.

[Æffltl

11,A

15X1TOWffim&#éWOT^

[O]OHWmWWi&AjE<

A

IMI

12,B

[#tfrl«IS+^^S^W^SMWttffia^JISTBPnr.

[Wi

A.JST+‘ttâfàm,

B.+Œfà;

c.«fi>«s^,rafwa^,

B.

[£»]

-,«S®(W4^,W20#,

l

13,*-.

2

r^wi#5^ix

[#^]â2x-l#,BPx^-tt,

22x-l

2

IMI

14,1

[MW]OTW:WÆiSlâZN^Za,«mWfZaWMMW.

M:&iÉZNB^Za,»

W180°-Za+10°=3(90°-Za)

M^Za=l°.

1.

15,2xy2(WM

[#W1WJ!Ü«,TOmtim.

[#M](D-â-WW^#;®OÆ1,

•••«MW»:2xy2.

W&03-.2xy2(#£«-).

[«]

16,(1)®®@;(2)a=2,b=-3

[#W1(1)

(2)WM(2-«)X2+(/?+3)X+1,ÈM^ÆW^2-«=0;/?+3=0,BPW^M.

[WM]M:(D®H^ÉiÜ::Êr:®2X2+/?X+1;®-ax2+3x',@.r2;

(2)2x2+/zr+l+(—ar2+3x)=(2-tz)x"+(Z?+3)x+l

:.2-a^0;b+3=0,

:.a=2,b=-3

[«]

ms,SWinWè.Wînrn.

17,1

[#ffi]MM,JIU^fflfêW(n+l)x(n+2)+2>Ms|Bl,SRAH=7^WBPRI.

[WWlȮO

3?1WW2x3+24vb®,

^2^ffl^W3x4+2^/h®,

M3^0^4x5+24^0

Èjtf^WPJW»Mn4"@J£<(ft+l)x(/î+2)+2>b/bEI

ân=7W

(n+l)x(n+2)+2=(7+l)x(7+2)+2=74

O7WMW14-

1.

[«]

H,wg®^64^.w^^tB»^0^,«gj£OM)

18,xy-x1,-3

fflCx=2j=^mw

[WW]W:J^^=12A>’+(3X2-5xy)-2(3xy+2x2)=12xy+3x2-5xy-6xy-4x2=xy-x2

ffix=2,j=|«AW

JM^=l-4=-3

[«]

19,(1)-5;(2)x=-1.

[^•tif](i)<iswo:w;

(2)£fé#,M,1W.

[WW](1)(---)X(-18)+(-8)

23

12

=-x(-18)--x(-18)+(-8)

23

=-9+12-8

=-5;

(2)4x-(x-1)=-2,

4x-x+l=-2,

fâ4x-x=-2-1,

W3x=-3,

Wx=-1.

[Æffil

20.(1)100,25,SJOW;(2)m=40,EÔWCrôft14.4;(3)6870A.

[Mtff](1)AÉA^mmte<MWtW>DWfaW=DaA&

(2)m=CââAIMMA^xioo,EWlSâÙll^ÆM=E^^^<A^kE^Jx360o;

o)w^^bMmaj^/bT63000w.

[WMJ(1)OÀO^£&A:IO+IO%=IOO(A),

WlMIWlW6-8<bBt±(B]fôA»:100X25%=25(A),

40

(2)m=—%=40%,Efô^ktA:1-(0.4+0.1+0.21+0.25)=0.04

Eââ^EÎZÈÙEI'ù^^J:0.04x360°=14.4°;

(3)3000x(25%+4%)=870(A).

30006/bHWAim^870A.

[«]

(^)ogtfr®.

21.4xy-x2,2.

£#|ë|^Mx=l,y=lftAttfêÆÉKJï^,U-MBPRT-

[WMlM:J!^^=x2-x2+3xy+2y2-