问题 解答题
计算:
(1)(6
5
11
-5
11
15
)÷[2
2
7
+(12-8
2
3
)÷1.4]

(2)[75%-(4
2
3
-3
4
9
)×0.25]÷[(2
5
6
+1
1
3
)÷2
1
2
-1
4
15
]
答案

(1)(6

5
11
-5
11
15
)÷[2
2
7
+(12-8
2
3
)÷1.4],

=

119
165
÷[2
2
7
+
3
1
3
÷
1.4],

=

119
165
÷[2
2
7
+
50
21
],

=

119
165
÷
98
21

=

17
110

(2)[75%-(4

2
3
-3
4
9
)×0.25]÷[(2
5
6
+1
1
3
)÷2
1
2
-1
4
15
].

=[75%-1

2
9
×0.25]÷[4
1
6
÷2
1
2
-1
4
15
],

=[75%-

11
36
]÷[
5
3
-1
4
15
],

=

4
9
÷
2
5

=1

1
9

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