问题 解答题
计算:
(1)
4
16
81
+
3-
8
27
;               
  (2)
5-2
6
答案

(1)原式=

4
44
34
+
3-
23
33
=
4
4
4
3
4
4
-
2
3

=

4
3
-
2
3

=

2
3

(2)原式=

(
3
)2-2×
3
×
2
+(
2
)2

=

(
3
-
2
)2

=

3
-
2

单项选择题
单项选择题