问题 解答题
下面各题怎样简便就怎样算
2
5
÷(
3
4
-
3
5
(1-
1
4
×
8
9
)÷
14
15
16
27
×
1
7
+
19
27
÷7
5
6
+
5
8
)×
24
25
答案

(1)

2
5
÷(
3
4
-
3
5
),

=

2
5
÷
3
20

=

2
5
×
20
3

=

8
3

(2)(1-

1
4
×
8
9
)÷
14
15

=(1-

2
9
)×
15
14

=

7
9
×
15
14

=

5
6

(3)

16
27
×
1
7
+
19
27
÷7,

=

16
27
×
1
7
+
19
27
×
1
7

=(

16
27
+
19
27
)×
1
7

=

35
27
×
1
7

=

5
27

(4)(

5
6
+
5
8
)×
24
25

=

5
6
×
24
25
+
5
8
×
24
25

=

4
5
+
3
5

=

7
5

综合题
单项选择题