问题 解答题
计算:
(1)
11
2
×
2
5
÷11                 
(2)3×(
1
2
-
1
3
)÷
1
2

(3)12÷(1-
1
2
+
1
3
-
1
6
)            
(4)2011÷(2011+
2011
2012
答案

(1)原式=

11
2
×
2
5
×
1
11

=

1
5

(2)原式=3×

1
6
×2

=1;

(3)原式=12÷(

6
6
-
3
6
+
2
6
-
1
6

=12÷

2
3

=12×

3
2

=18;

(4)原式=2011÷

2011×2012+2011
2012

=2011×

2012
2011(2012+1)

=

2012
2013

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