
初二数学历届考题2017
Quiz
•
Mathematics
•
8th Grade
•
Practice Problem
•
Medium
曾伟文 CHEN WAI MUN
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40 questions
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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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