题目内容

化简下列分数:
(1)-
21
7
;                 
(2)-
3
36
;                   
(3)
-54
-8

(4)
7
-
1
3
;                  
(5)
-
1
4
5
;                   
(6)
-6
-0.3
(1)-
21
7
=-3.

(2)-
3
36
=-
1
12


(3)
-54
-8
=
27
4


(4)
7
-
1
3
=-21.

(5)
-
1
4
5
=-
1
20


(6)
-6
-0.3
=20.
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