题目内容

下面的题怎样简便就怎样算
81.2-11÷7-
1
7
×3
9
13
÷8+
1
8
×
7
13

6696÷62-6.5×10.6
[
3
4
-(
5
6
-
2
3
)]÷
5
4
(1)81.2-11÷7-
1
7
×3,
=81.2-
11
7
-
3
7

=81.2-(
11
7
+
3
7
),
=81.2-2,
=79.2;

(2)
9
13
÷8+
1
8
×
7
13

=
9
13
×
1
8
+
1
8
×
7
13

=(
9
13
+
7
13
)×
1
8

=
16
13
×
1
8

=
2
13


(3)6696÷62-6.5×10.6,
=108-68.9,
=39.1;

(4)[
3
4
-(
5
6
-
2
3
)]÷
5
4

=[
3
4
-
1
6
5
4

=
7
12
×
4
5

=
7
15
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