578922222578922222學(xué)年七年（上）期考試數(shù)學(xué)卷一選題本題9小題每題3分，分在小所出四選項(xiàng)，有項(xiàng)正的只把案接寫(xiě)答卷相的置）A

B

C

D8A10

B10

C

D0.637A1

B

2

CD

0.666669.181181118A6

B5

C4

Da

5b

A

B

C

DABCx3+1xxDR

22222b22222bAyxBxyCx+Dy+x118292020A3B4CD91個(gè)12208A566472D二填題本題9小題每分共分．需出答程只把案接填在題上應(yīng)位處10125212131423286a+9155yx+yx16+axybx3y1a17b0aba18

n199822332222n199822332222152x三解題本題小，53分請(qǐng)答卷指區(qū)內(nèi)答解時(shí)寫(xiě)文說(shuō)、明程演步）1911+22

344[3+0.8]20xx+1xx+2x2

xx212xy+5xy+3xy22acca+b

231ab2a2

5789n85789n82425+9334122.42611326

B2020BA參考答案試題解析一選題本題9小題每題3分，分在小所出四選項(xiàng)，有項(xiàng)正的只把案接寫(xiě)答卷相的置）A

B

C

DC8A10

B10

C

D0.637a10n1n

2222CA1

B

2

CD1BC15D1D

0.666669.181181118A6

B5

C4

D03.1430.6666606a

5b

A

B

C

Dab

5b1

2222222222222222

ABCx3+1xxDRabcB1Cx3+1xx1DRDAyxBxyCx+Dy+y+Dx118292020A3B4CD9

2222222222356782020x15+3x189x9+312x126x6x3+3322120206C1個(gè)12208A566472D33344455nnnn333444555nnn8D

2222222222二填題本題小，空分共20分．需出答程只把案直填在題上應(yīng)位處102070+12522

24545212132113931423286a+9

2222b222b22222b222b23a832a8155yx+yx28xx5y3+0xyx5xy216+axybx3y1a9x+axy2+35+12+6+7a+30a3b2a3917b0abaaab00+baa0ba0b00baa18152

n1998199822n1998199822x8P8242164678x502三解題本題小，53分請(qǐng)答卷指區(qū)內(nèi)答解時(shí)寫(xiě)文說(shuō)、明程演步）1911+22

344[3+0.8]2342283363618+20211949

36

33223232222222222332232322222222222222228.120xx+1xx+2x2

xx2x+1+22xx+1x+2x2x

4212xy+5xy+3xyy32x

yx

y+3xy

6xy+3xy5xyxy00x0+0xyxyx122acca+b根

222222ccba0bcabcab+2231ab2a21+2ab++2+22a222+22320cm24

1+2

1+2

25+9334122.42310km23|+|+5|+|+4|+|8|+|+6|+|3|+|6|+|4|+|+10|139.22611326