问题 解答题
计算或化简:
(1)
12
-
18
-
0.5
+
3
3

(2)(2
5
+3
3
)2-(2
5
-3
3
)2

(3)
18
-
2
2
-
8
2
+(
5
-1)0
答案

(1)

12
-
18
-
0.5
+
3
3
=2
3
-3
2
-
2
2
+
3
=3
3
-
7
2
2

(2)(2

5
+3
3
)2-(2
5
-3
3
)2

=(2

5
+3
3
+2
5
-3
3
(2
5
+3
3
-2
5
+3
3
)

=4

5
×6
3

=24

15

(3)

18
-
2
2
-
8
2
+(
5
-1)0

=3

2
-
2
-
2
+1

=

2
+1.

单项选择题
单项选择题