问题 解答题
(3
5
6
-2
3
4
)÷(
3
14
+
2
7
答案

(3

5
6
-2
3
4
)÷(
3
14
+
2
7
),

=(

23
6
-
11
4
)÷(
3
14
+
4
14
),

=

13
12
÷
1
2

=

13
12
×2,

=

13
6

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