题目内容

计算:1-[(2
1
2
-1
1
3
)÷1
1
6
]÷4
2
3
+1
1
3
=______.
1-[(2
1
2
-1
1
3
)÷1
1
6
]÷4
2
3
+1
1
3
,
=1-[(
5
2
-
4
3
)×
6
7
]×
3
14
+1
1
3
,
=1-[
6
7
×
5
2
-
6
7
×
4
3
]×
3
14
+1
1
3
,
=1-[
15
7
-
8
7
]×
3
14
+1
1
3
,
=1-1×
3
14
+1
1
3
,
=
11
14
+
4
3
,
=
33
42
+
56
42
,
=
89
42
,
=2
5
42
;
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