天津市部分区 2020-2021学年上学期期末考试八年级 数学试卷

323233922﹣89﹣8学年天津市部分八年级（上期末数学卷一选题本题12小，小3分共分，每题出四选中只有-项是符题要的把小的案在表）A

B

C

D3cmA1B3C5cmDACaa

BaD50.0000000050.000000005A510

B10

C10

D50

﹣9xA

B

C

D

Aa+bBC

D1080A6B7CD91A

B105

C60

D45

232222xyx12232222xyx121232xx1x+eq\o\ac(□,+3)eq\o\ac(□,)xeq\o\ac(□,)A9x

B9x

C9xD9x10BADADAEBDCDECAB107AC6cmBCABAEDA9B13CD10121000m1.2xmABCD二填题本题6小题每题3分共18分请答直填题横上13

1479x15a2a16234617llllA30

222242222224221AB6CD18ABCBC36EFEFDBCM1BMD2BMD三解题本题7小题共46分解应出字明演步骤证过）191xyzx2xy44201x2x2+yx+21FADAABEF1DFE2AB9DE3

221xy2+2312

24921xkmhxkm

km/h

h

x225ABD的AEBD1EABECED2EECED

32332339223412223362学年天津市部分八年级（上期末数学卷参考答案与试题解析一选题本题12小，小3分共分，每题出四选中只有-项是符题要的把小的案在表）A

B

C

DBCDC3cmA1B3C5cmD4cm171ACaa

BaDB4CaaDaD

﹣89﹣﹣89﹣8﹣n﹣9250.0000000050.000000005A510

B10

C10

D50

﹣9a0510xA

B

C

Dx2Bx2xx0C2xx2Dx2+2

Aa+bBC

DC

1080A6B7CD9nn180nn

23222323222318021080nC1A

B105

C60

D4529014532xx1x+eq\o\ac(□,+3)eq\o\ac(□,)xeq\o\ac(□,)A9x

B9x

C9xD9xx2xx1x+310BADAD

AEBDCDECADAAAASADBBCEBASAADBBCECADBDDAB107AC6cmBCABAEDA9B13CD10BEDECDAEBDEBDCcmDEABBE7AEAD+DE+3+6121000m1.2xmA

2222xyx2222xyxBCDxmD

二填题本题6小题每题3分共18分请答直填题横上13

30x3x3

x01479x9Px79x9915a2a+bbab2ba3162346

xxxyxxxxyx2yy121212243622223181817llllA301AB6CDBCD3A90A60llBCD60CD6AB3CD318ABCBC36EFEFDBCM1BMD2BMD5.5

2222222BMD2BMDBMD2ACDBD1.5cmBCADcmAMBMBM++DMAD+BMD+5.5cm5.5三解题本题7小题共46分解应出字明演步骤证过）191xyzx2xy442xyzxy

224322432423222222222243224324232222222222222xy49y4y43201

8x2x

2+yx+28x2x6x2x8x2x3x2+yx+4x

xy+y

4xy2xyy3xxy2y21FADAABEF12AB9DE3AASAFBDFE2CEEDABDADDF

AFB2AFBDFEDE9DECD+12221xy2+2xy3xy2

1

2312

x

233x4x42x4xxx4x424921xkmhxkm

km/h

h

1.5xx2xkmhxkm22hx/h/

h1.52

2xx150

xkm/25ABD的AEBD1EABECED2EECEDAB