题目内容

用自己喜欢的方式计算
1
2
-(
3
4
-
3
8
)       
1
2
+
1
4
-
1
6
       
5
6
-(
1
2
+
1
3
)         
7
8
-
5
12
+
1
6
2
3
+(
1
2
-
1
4
)       
4
3
-(
2
5
+
3
10
)      
5
7
+
1
4
-
9
14
        
3
4
+
3
6
-
5
8
分析:(1)(3)(5)(6)按照先算括号里面的,再算括号外面的顺序解答;
(2)(4)(7)(8)按照从左到右顺序解答.
解答:解:(1)
1
2
-(
3
4
-
3
8
)       
=
1
2
-
3
8

=
1
8


(2)
1
2
+
1
4
-
1
6
   
=
3
4
-
1
6
  
=
7
12


(3)
5
6
-(
1
2
+
1
3
)         
=
5
6
-
5
6

=0;

(4)
7
8
-
5
12
+
1
6

=
11
24
+
1
6
         
=
5
8


(5)
2
3
+(
1
2
-
1
4
)    
=
2
3
+
1
4

=
11
12


(6)
4
3
-(
2
5
+
3
10
) 
=
4
3
-
7
10

=
19
30


(7)
5
7
+
1
4
-
9
14
      
=
27
28
-
9
14
        
=
9
28


(8)
3
4
+
3
6
-
5
8

=
5
4
-
5
8

=
5
8
点评:本题考查知识点:依据四则运算计算方法正确进行计算.
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