题目内容

怎样简便怎样算
(68-
17
18
)×
1
17
5
6
÷[
4
5
÷(1-
1
3
)]
4
5
-
4
5
÷4
5
3
-
2
7
-
5
7
(1)(68-
17
18
)×
1
17

=68×
1
17
-
17
18
×
1
17

=4-
1
18

=3
17
18


(2)
5
6
÷[
4
5
÷(1-
1
3
)],
=
5
6
÷[
4
5
÷
2
3
],
=
5
6
÷
6
5

=
25
36


(3)4÷
4
5
-
4
5
÷4,
=5-
1
5

=4
4
5


(4)
5
3
-
2
7
-
5
7

=
5
3
-(
2
7
+
5
7
),
=
5
3
-1,
=
2
3
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