题目内容

用你喜欢的方法计算下面各题.
(1)208×35÷(100-48)

(2)
8
13
÷7+
1
7
×
5
13
(3)2-
6
13
÷
9
26
-
2
3
(4)〔
14
15
-(
2
5
+
1
3
)〕÷
7
10
(1)208×35÷(100-48)
=208×35÷52,
=208÷52×35,
=4×35,
=140;

(2)
8
13
÷7+
1
7
×
5
13

=
8
13
×
1
7
+
1
7
×
5
13

=(
8
13
+
5
13
)×
1
7

=1×
1
7

=
1
7


(3)2-
6
13
÷
9
26
-
2
3

=2-
4
3
-
2
3

=2-(
4
3
+
2
3
),
=2-2,
=0;

(4)[
14
15
-(
2
5
+
1
3
)]÷
7
10

=[
14
15
-
11
15
10
7

=
1
5
×
10
7

=
2
7
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