问题 解答题
化简:
(1)计算:(-1)3+(2010-
2
0-|-
1
2
|

(2)(x2-xy)÷
x2-2xy+y2
y
x2-y2
x2y
答案

(1)(-1)3+(2010-

2
)0-|-
1
2
|

=-1+1-

1
2

=-

1
2

(2)(x2-xy)÷

x2-2xy+y2
y
x2-y2
x2y

=x(x-y)•

y
(x-y)2
(x+y)(x-y)
x2y

=

x+y
x

单项选择题
单项选择题