2020-2021学年人教 版八年级上册数学期末复习试卷

0623234845620623234845622学年人教新版八级上册数学末复习试一选题共10小题，分分每题3分A

BC

DA0

BxxCa

＝

12

Da

aAC

BDBAACACDCDECEDEDEBABCDSAS3c9ab

32434243243424A

bcaC3bcD

xxA2B3CD5x+a++4x+bA3B34D4ABCABACBCMNACDA9A2

BB0

C110C1

D12D210ABAECD60EF2A3B4CD6二填题共6小，满18分，小分11x

12131415OPAOBCPCD

322222322222PD16ABC4FADE+CF三解题共9小，满72分）171x32x

3x34xyx+2y243x1812

+119

20C1meq\o\ac(△,A)eq\o\ac(△,)B2

222222222222222222222222222221①x2xy+y

4x

2+yxy

2xy2+2②x+2xx4+12x+1+21x+3③14x+6x7xx1x1①x2②x26+8③xx+62abcABC

+b+446022ABADB

23ABCDAB46BCECEDEBBE1t12APt3

ABP①

PDE②t

PDE241.512251ACBAC于BCAHBC90BAH+CAH90B90BCAH

ABHCAHBHAHAHAHBC2ADEABADBAC90ABCADE45DCABCCEAHCE3ABP6BP

0642380642381245624参考答案试题解析一选题共10小题，分分每题3分BCD2019

BxCab＝DaD1BCD

ABCDECABCSASD

ab

2

c9

b

D2xxx

222222x243xx++4x++x+abxa4C

x+3MNCDBD+CD+AD+BDADACAB11Cm1+0x0x3xm1+3m210EGBCG60ACBCDEACB303090EFAB

4222242222AEEGEFeq\o\ac(△,Rt)DEGDEEGDFEF+660ACBCDEACB30AECBEDE902EFDFDE6D二填题共6小，满18分，小分1140x212xx+94x

4xx2x3x2+3213n23606

144.2﹣

5

10

5

15PDOBOPAOBOAPDPCPDPD16EMADN

2AMBM2AMAEABCADBCEMBCADEMAMAEADAD+CFACBAMBM

4x3+43236364x3+4323636962322222222BCFECF3030三解题共9小，满72分）17x

﹣

m4+1+3

﹣

mx2x4xx

y4x

y3x312x4xyx+2y29xyxxy++4xyx3y18x4x2x2232+3xx19

x

222222222222222222222222222222xx3x3x3

20eq\o\ac(△,A)eq\o\ac(△,)233131321①+4+14x+12x

y2x+12+1②xx+8x6+91x3﹣1x3xx4x2③xx+6x23xx32

+

44b6+170a+44b+4+c6a+babc

22222222222222222a+2+2+3772221+BAEBAEDAEBACDAEBACSASD23ABCDCDeq\o\ac(△,Rt)DCEDE

2ABDC90B13PDE2eq\o\ac(△,Rt)PDEPDDEeq\o\ac(△,Rt)PCDPC+CDDEPC+CD9t

5

t

+4

DPE90P

222222t6PDE②PDDEPEDEPDPDDE3PDDEDCCE3CP3PEDE4BEPE94PD5+3+PCPDeq\o\ac(△,Rt)PDCCD+PC3+16+PCPCt34

24x

+

1x30x30

2

+

1825AHBC90BAH+CAH90B90BCAHABHCAHBHAHAHAHBC90AHCDCECE+2CDDAB++BAE90DABEACADABADBAECSASABDACEABCACBABD13590DDB

DBCEAHAAHBPHBP