问题 解答题
化简:(1)
11+2
18

(2)
4-
15

(3)
23-6
10+4
3-2
2
答案

(1)原式=

(
9
) 2+2
18
+ (
2
) 2

=

(
9
+
2
) 2

=

9
+
2

=3+

2

(2)原式=

8-2
15
2

=

(
5
-
3
) 2
2

=

5
-
3
2

=

10
-
6
2

(3)原式=

23-6
10+4
(
2
-1) 2

=

23-6
10+4 (
2
- 1)

=

23-6
2(
2
+1
) 2

=

23-6
(2+
2
)2

=

11-6
2

=

11-2
18

=

(
9
-
2
)2

=3-

2

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