题目内容

下面各题,用你喜欢的方法计算.
12×(
5
6
-
2
4
)
1
2
÷
5
4
×
2
3
6÷(1-
2
3
)
8
13
×
1
7
+
1
7
×
5
13
19-
4
5
-
6
5
1
3
÷[
1
4
÷(
2
3
-
1
2
)]
(1)12×(
5
6
-
2
4
),
=12×
5
6
-
2
4
×12,
=10-6,
=4;

(2)
1
2
÷
5
4
×
2
3

=
1
2
×
4
5
×
2
3

=
4
15


(3)6÷(1-
2
3
),
=6÷
1
3

=6×3,
=18;

(4)
8
13
×
1
7
+
1
7
×
5
13

=
1
7
×(
5
13
+
8
13
),
=
1
7
×1,
=
1
7


(5)19-
4
5
-
6
5

=19-(
4
5
+
6
5
),
=19-2,
=17;

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

=
1
3
×
2
3

=
2
9
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