题目内容

计算下面各题.(能简便的用简便方法计算)
6
5
×
2
15
+
2
15
÷
4
5
8
3
×(
1
3
-
8
21
×
8
16
9
10
×11-
9
10
(1)
6
5
×
2
15
+
2
15
÷
4
5

=
6
5
×
2
15
+
2
15
×
5
4

=
2
15
×(
6
5
+
5
4
),
=
2
15
×
49
20

=
49
150


(2)
8
3
×(
1
3
-
8
21
×
8
16
),
=
8
3
×(
1
3
-
4
21
),
=
8
3
×
1
7

=
8
21


(3)
9
10
×11-
9
10

=
9
10
×(11-1),
=
9
10
×10,
=9.
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