1.7整式的除法
1.下列各式计算正确的是 ( )
A.6x6÷2x2=3x2 B.8x8÷4 x2=2 x6
C.a3÷a3=0 D.a5 b÷a5 b=1
2.计算6 x2n y÷3 xn y的结果为 ( )
A.2xn B. 2x2y C.3xn D.3x2
3.计算(a2) 4÷a5÷a的结果为 ( )
A.a5 B.a4 C.a3 D.a2
4.8 a2 b2÷(4ab)= .
5.(-6 a4 b2c)÷(3a3 b)= .
6.(6×106)÷(-3×103)= .
7.12 a3b÷(-3a2b)= .
8.÷= .
9.3an+1÷2 an= .
10.(24 x8-21x6)÷( )=8 x3-7x.
11.( )÷0.3 x3y2=27 x4 y3+7 x3 y2-9 x2y.
12.6 a2 x3·( )=36 a4 x5-24 a3 x4+18 a2 x3.
13.计算.
(1) ÷(0.375 x4y); (2)(0.4 x3 ym)2÷(2 x2yn)2。
14.计算.
(1)÷(-3xy);
(2)[6 a2m+1·(-a2)2-3 a2m+2-9(am+1) 2]÷.
15.(1)按下列程序计算,把答案写在表格内.
输入n
3