初二数学历届考题2017

初二数学历届考题2017

8th Grade

40 Qs

quiz-placeholder

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初二数学历届考题2017

初二数学历届考题2017

Assessment

Quiz

Mathematics

8th Grade

Practice Problem

Medium

Created by

曾伟文 CHEN WAI MUN

Used 7+ times

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40 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

求5x²+3x+6,7x2+5+x 及 4+3x+2x2 的和。

14x2+7x+15

14x2+5x+15

10x2+7x+12

12x2+5x+15

2.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

化简 2x2y2 × (-y)2 ×4x3y 。

8x6y4

6x6y4

8x5y5

-8x5y5

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

计算 (1-x)(3x2-7x+5)。

-3x3+10x2-12x+5

3x3+10x2+12x+5

3x3+4x2-2x+5

-3x3-10x2-2x-5

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

化简 (15x4y2-5x2y2)÷ 5xy。

x3y-xy

6x3y2-y

3x3y2-xy

3x3y-xy

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

化简 (ab2)3(ab)5

a3b7

a5b7

a8b10

a8b11

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

展开 (x+5)(3x-1) 后,x的系数为_____。

-14

14

-16

16

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

因式分解 5xy3-25x3y。

5xy(xy2-5x2)

5x3y3(x-y)

5xy(y2-5x2)

5xy(y2-20x2)

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