题目内容

计算下面各题,能简算的要简算.
(
8
9
-
1
3
)÷(
1
2
×
2
3
)
3
4
÷[(
2
3
-
1
6
)÷5]
3
10
÷(
4
5
-
1
2
)-
5
6
(
1
3
-
1
5
-
1
10
)×30
15-
4
5
×
2
3
-
7
15
6
7
×
1
11
+
1
7
÷11
(1)(
8
9
-
1
3
)÷(
1
2
×
2
3
),
=
5
9
÷
1
3

=
5
3


(2)
3
4
÷[(
2
3
-
1
6
)÷5],
=
3
4
÷[
1
2
÷5],
=
3
4
÷
1
10

=
15
2


(3)
3
10
÷(
4
5
-
1
2
)-
5
6

=
3
10
÷
3
10
-
5
6

=1-
5
6

=
1
6


(4)(
1
3
-
1
5
-
1
10
)×30,
=
1
3
×30-
1
5
×30-
1
10
×30,
=10-6-3,
=1;

(5)15-
4
5
×
2
3
-
7
15

=15-
8
15
-
7
15

=15-(
8
15
+
7
15
),
=15-1,
=14;

(6)
6
7
×
1
11
+
1
7
÷11,
=
6
7
×
1
11
+
1
7
×
1
11

=(
6
7
+
1
7
)×
1
11

=1×
1
11

=
1
11
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