2020年河南省中考數(shù)學(xué)模擬試卷解析版

645564552020年河南中考數(shù)學(xué)模試卷解析一選題共10小題，分分每題3）AabCabb

BbDaa|bA

B

C13

D1.312A

B

C

DDaBCACB2A

B70

C75

D80403540A

B4241C41D1/22AC

BDBD交OABOEOE3ADCA6B3D312346A

B

C

DxC120DDEEFFFFGOBGDDA1

B2

C4

D8

1EFG分AEBFEFGyxxEFG2/2202220222A

B

C2D二填題共5小，滿15，每題分OMEMMF12y2xy+1aABAC75CABCBDBCADBDBCBE2ABAC三解題共8小，滿75）82x

49B1

A

15003/229OPOABPAODEODOEEBO8AOD

mB60CD9yA4ykn14/222QxQCPQQ10B125A34BAA12Ay40%10ABCBDCDBADCAD2EBEBEBEACBEBFCEFCCGEFBF106CF5/221yxmx2m0xAByCACDBOD1ABC8m21

3y+bMMMNHHHMAyPHMNQ6/22n6nn6n參考答案與試題解析一選題共10小題，分分每題3）Ca

nnn13010Aa1010nn2

1a|ACBCCDACBBCD45123BCDACBCCDACB7/22BCDACB45123BCDB35404265

41Bx1x+101xDADeq\o\ac(△,Rt)ODABCDACBDOCOBODADO30AEEBOD8/22ADeq\o\ac(△,Rt)AODADAOD30ODAD

BDOD

A63

BGCEFODE30BFx122CF2444ODxGOD+DBGxBC60DEOCEEFFCEFxCF2CE24xOE12CExOD289/22GDODBG8xx4OD8328OE4DE4

D

3EFGyEFGxyBAB2x1EFGyAE1A二填題共5小，滿15，每題分10/224DFDDMEMMF12CEDFDCFCEMCMEM12CMDMCM

02xy1x0y2x11/222+S22+S2a

ax+12xa10BDKS陰

△

扇形

BCD

S

△

CKBDKAB3757530eq\o\ac(△,Rt)CK1BKCBCDCKBD

BDBK2

BCDBACEBCDS陰

△

扇形

eq\o\ac(△,S)

4

ADC90DECDDE4BD6ABACADBDE12/2222222222222222222ADCDECDBC10BECEDE4BDeq\o\ac(△,Rt)ABDADBDeq\o\ac(△,Rt)ACDACAD

CDAC

2020三解題共8小，滿75）x2xx44+42

1CA360120050%A

3602400602120080013/223B1500500EPABOEDOEEOBEDOEBO22OA4OAD

83DEAEBPAABAO14/22OEPAADODOEAODOAADOEOBDOEODOEEDOEBO28OA4AODD

OD3DE4ODDEODEEDO15/221EBOEDO60OBBEOE4D30A30DBCAABD60BD6030

m14mmABCk2BQAmx444yxC5nyxn5415C51ykk55y16/22215ABB04QqPBCQQABBPP15Q0BQCPBQCPP15Q4CQBCQ15Q4021x17/Ay152y10+2315100x80066x+15x]x50x+8006x50ww506+800100x5050B12ECEBCBED30+2BAEABEBEDHENACEMAFEeq\o\ac(△,Rt)9030EFFMFMm2mFGEG2CFFG12meq\o\ac(△,Rt)eq\o\ac(△,Rt)HLCN118/22BDCDADBCABCAD2ECBDBCBDCDEBBCBEBCBCEABEA22BAEBFC2BAEABEBED19/223ECEHHEMMCADABEAEHENEMBFC6060eq\o\ac(△,Rt)EFM60FMFMmEFFGEF6，F(xiàn)NCF12EMB90EMENeq\o\ac(△,Rt)EMBeq\o\ac(△,Rt)ENCBMFM+10m124m+1CF4AOAmOB22DDFDEOE20/121221212222212122121222221122OCOCDDF

3AMPHxMx+xyx2xmxyx+0xx2Am0B20xy2m02mAB2+m

eq\o\ac(△,S)

2+mmmm42DDFyF1y4B20x4Dtt2t4DFt4tt+2tOCDF