遼寧省沈陽(yáng)七中學(xué)2023-2024學(xué)年數(shù)學(xué)七年級(jí)第一學(xué)期期末調(diào)研試題含解析

2023-2024

1.

3.^émOmmBO-t.??.

-,?&?(<<h?3#,&30#)

1.TJüS^,^PQ??SàPO^LWMê()

2.26cm,1cm,^iOn2cm,fàxcm,

()

A.x—1=(26-x)+2B.x—l=(13-x)+2

C.x+l=(26—x)+2D.X+l—(13—A")+2

3.^Mi?Ma*b=a2-3b,JülJ4*1fifiê()

A.5B.7C.13D.15

??èù>()

5.?E^I,o,-i,-2^,ftzbM^?()

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

6.()

d<5^f?iFMSlWf^i+^

B.

c.

D.

7.)

A.O?M?B.￥Af?OtfJ180

c.^?mb?^*è?D.

8.Bftx-3y=3,SP^R?3-2x+6ya?j{èM()

A.-3B.0C.6D.9

9.g?fti?x2+JT+18^()

A.B.C.D.

10.201911.7^TTWièH.77j^W^^,A+tt&SOOO^&lft

()

A.11.775^^

B.5000

C.5000

D.11.7

->?<h?35??185?

H.-4\ft^<Mj60°1325">.

12.i+M:-12OW>W^M??

13.tt-2*.H^/bTOWê&W.

2

14.■

15.^M-ar2/+l^-ar"'y4a<J^>M^^,WJm-2n=.

65

16.i+^:3-|-5|=.

H,)|?5^?(??^8/b?,^72#)

17.W?l-^BaPW.ffllffl^m?40^?W^200^?a

18.(85?b.c?^±?!i?jng^aw>W,4tfe:kl-l?+M-|c-&|=

ac0b

19.(85?O^OABiM,OC±OD,WOET5>ZAOD.

(Dfcffl?,^J?TZCOE^ZBODZfHJ?91&*^M,?Sè?

(2)^ZCOD^^M(l)+ZCOE^ZBODZl’BlW^*^^S?4t?#?Sé;

(3)^ZCOD^￡O^WSS?lW?.?%ZCOE^ZBOD±fSJ?*^,#Wé.

20.(8#)M,B&ZAOB=ZCOD=90°.

(1)(<?#)

(2)?(1)

21.(8#)%M,2x2+[x2—(3x2+2x-l)+x=--

2

22

22.(10#)B^^^?^3.r+'?y-8-^^?^-/u+2y+7^+,y,^/i"'+m"è<J<

23.(10#)(1)—+-=1

26

(2)fê#|g:=

24.(12#)￡$|W62MA,<AftX￥^lt^?ic^W#12>b^Z#<^23^.BMl

§3^?^#^2^ZW#K^-?,^A^ZW#,

1>C

il-￡WM,BPWO.

[^iA.PQ^ifoi,

B.PQ^flfOi,

C.PQ±I,BP:mPQ^??^?PM!l<^iW^,

D.PQ^ilfOi,?&TO'ê-M.

ttiaC.

*S“a?^tfiW^y￡m=S,nq?<Ola<j8g&w

2>B

[^?r]^mK-lcm=K^^+2cm,f??^WPnI.

IW1M:iSK^lW^xcm,WM(13-x)cm,

^^K-lcm=K^M+2Cm,

X-1=(13-X)+2,

B.

3>C

(W)i,M&?SMBPRT

[WJ4*1=42—3x1=13

c.

M&iêjroj,

4,C

[##rim?^aw^/b?tH^a?/h?BpnT.

(WM1v1-3.51=3.5,1+2.51=2.5,|-0.1|=0.1,|+0.7|=0.7,

0.1<0.7<2.5<3.5,

ft?o=??-o.i.

?BAW-?émWé,?fit

5>A

[#ffi]?WM?Wtfo,o*ftt,M^?r?Hs,WàMdWW.

[WM]i>o>-i>-2

?■?*/bW^?-2.

?&?A.

ABWT^&aWm?,&^*mWMMBlft^.

6^A

[WJi^BBit,??*,

gU^?M^^?I^M?360oèfjtL.m,

[WMlM:

?&&A.

7,D

(WM)M:A>M?Zfam&M,Wt?,

B,￥?aw^i8?,WM,

c.WM,*MW-ê-?li;

D>W^,?30°6WR^60°,M30<60,

M:D.

[￡?]

￥A?ü?X>JiTS^BSt

8,A

[##flJex-3j<^->b^^A^^aW^BPnT#M.

[WM]M:S^jA-3y=3,

#fy,3-2x+6y=3-2(x-3y)=3-2x3=-3,

A.

[￡m

9,B

[Wif??￡??i$?^wift￡jOPWHi￡tè.

rwi&:z^x2+x+?*,^^m^x2,x&?2,è3>b?m￡m,

i&ZVfa,X2+x+18

iftifcB.

[aBfl

10,c

rwifêfé&flbW,#??,^S&?fi^WPnT.

[WJM:?àaM'n]^^,5üOO￡OTW￡IW^?,

C.

M

^,#??,a#o>

-,</b?3#,#U8#)

11>29°46'35"

[##T]i+WBPnr.

(ftfa]90°-60°13'25”=29°46'35"

29°46'35".

[?]

12,-1

rwi

[WJM:-l200^-1;

-1.

[?Btl

13,-1,1

??^bbt^m^-2fi/b^-^w?w-bi.

2

[Wt?:i.

2

-1,1.

IMJ

14.-11

W?Vaft3WjOtf3:-b1.

-1,1.

[as?i

15.-4

[ftWJf?JSI^TO?X,m=2,n=3,lüijm-2n=-4

16.-2

[##rl^sWfêmBPW

[W1ü?:3-1-5|

=3-5

=3+(-5)

=-2,

ife^^J-2.

[?]

=.^72^)

17.ffi5/n3Wt?MW.WBB^W^200W

[#tfrl?fflxm3AW,(6-x)m3WftfcBW.?MfflA

BP?T^HJ^TXaù-Tü-^?,^BPWHJxiftM,S^^A40x4’BPRT^Hi^Tù.

[W1M:Mfflx/w3Wtt?W,(6-x)rn3m^BW.

40x=200(6-x)

^x=5

6-x=6-5=1

40x=40x5=200

IMJ

18,a.

[#ffi]a,b,ci&jE&W,WMm^WWtf?,*MW.

[WM1è^ttWW,a<c<0<b,|a|>|*|,

Jüükl-|a+Z>|-|c-b\

=-c-[-?a+b')]-(Z>-c)

=-c+a+b-b+c

—a,

a.

[?JWJ

19,(1)ZBOD=2ZCOE,JLMtff;(2)?M#T;(3)Z.BOD+2ZCOE=360>?Mtfr.

[Mffi](1)?SM5CWWZCOD=90°,mM^^ZBOD=90°-ZAOC,

ZCOE=ZAOE-ZAOC=-ZAOC=90+ZA0C_ZAOC=90~ZA°C,MWZBOD=2ZCOE;

222

(2)èZCOD,OEY^-ZAODpJWttlZCOE=90’-ADOE,ZBOE>=180°-2ADOE,Mf?nWtBZCOE

WZDOB

(3)M$g(2)WM^.

[WMlM:(1)ZBOD=2ZCOE,SèftlT:

\OCLOD,:.ACOD=9(f,

:.ZBOD=9tf-ZAOC,

ZCOE=ZAOE-ZAOC=ZA°D-ZAOC=90’+ZAOC90'-ZAOCABOD

xC.ziCzC^—

2222

:.ABOD=2ACOE-,

(2)?&T:

VOCEOD,

ZCOD=90\

ZCOE=90°-ZDOE,ZBOD=180“-2ZDOE=2(90°-ZDOE),

ZBOD=2ZCOE-,

(3)ZBOD+2ZCOE=360,?HJfclT:

OC-LOD,:.ZCOD=90,

ZCOE=90°+ZDOE,

ZBOD=90“+ZBOC=90“+90°-2ZDOE=180-2(ZCOE-90)=360-2ZCOE,

ZBOD+2ZCOE=360.

20,(1)?ZAOC=ZDOB-,?ZBOC+ZAOD=180°-,(2)&?,SèW;$u&?,SèWtfr.

[##T](1)?^ZAOB=ZCOD=90°,?±ZAOD

(2)f?faZAOB=ZCOD=90°,?±ZAODBPtg^?Mê^BP^gta?.

[WJ(1)?ZAOC=ZDOB

?ZBOC+ZAOD=180°

(2)??,Sè:ZAOB=ZDOC=90°,

ZAOB+ZAOD=ZDOC+ZAOD,

ZDOB=ZAOC

T&?,Sè:VZAOB=ZDOC=90°,

ZBOC+ZAOD=360°-90°-90°=180°

21,-2x+l,2

[5X1B^à^<BPRT.

LW12x2+[x2-(3x2+2x-l)]

=2x2+(x2-3x2-2x+l)

=2x2+(x2—3x2-2x+l)

=—-2x4-1

^=-2x+l=-2x(—-)+l=l+l=2.

22

[?]

?STS??,

22,8—.

8

W:(3X2+my—8)—(—nx1+2y+7)=(3+n)x2+(???—2)y—15,

V^J^^3x2+??7y-8-^^^^-rtx2+2y+7èù^41,'f'a’Wx,y,

.'.3+n=0,m-2=0,n=-3,m=2,

.-.n'"+m"=(-3)2+2'3=9+(--)=8-.

88

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