问题 解答题

4
5
÷
1
3
×
1
7
4
5
÷(
2
5
+
3
4
5
6
÷(
4
7
÷
9
11
(2+
1
5
)×15.
答案

(1)

4
5
÷
1
3
×
1
7

=

12
5
×
1
7

=

12
35

(2)

4
5
÷(
2
5
+
3
4
),

=

4
5
÷
23
20

=

16
23

(3)

5
6
÷(
4
7
÷
9
11
),

=

5
6
÷
44
63

=

105
88

(4)(2+

1
5
)×15,

=

11
5
×15,

=33.

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