题目内容

计算下面各题,怎样算简便就怎样算.
1
10
÷
3
20
-
5
8
×
2
5

5
8
-
6
25
÷
2
5
+
1
4

1
8
×
5
9
+
4
9
÷8

[
5
6
-(
1
2
-
1
3
)]×
9
10

(1)
1
10
÷
3
20
-
5
8
×
2
5

=
2
3
-
1
4

=
5
12


(2)
5
8
-
6
25
÷
2
5
+
1
4

=
5
8
-
3
5
+
1
4

=
1
40
+
1
4

=
11
40


(3)
1
8
×
5
9
+
4
9
÷8

=
1
8
×
5
9
+
4
9
×
1
8

=
1
8
×(
5
9
+
4
9
),
=
1
8


(4)[
5
6
-(
1
2
-
1
3
)]×
9
10

=[
5
6
-
1
6
9
10

=
2
3
×
9
10

=
3
5
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