题目内容

怎样简便就怎样算.
(15+
5
7
)×
2
15
2
11
×
7
10
+
2
11
×
3
10
13×
3
14
+
3
14
2005×
2003
2004
(45×
3
5
+5)÷
4
5
7
3
+
2
3
×
6
5
.
(1)(15+
5
7
)×
2
15
,
=15×
2
15
+
5
7
×
2
15
,
=2+
2
21
,
=2
2
21
;

(2)
2
11
×
7
10
+
2
11
×
3
10
,
=
2
11
×(
7
10
+
3
10
),
=
2
11
×1,
=
2
11
;

(3)13×
3
14
+
3
14
,
=(13+1)×
3
14
,
=14×
3
14
,
=3;

(4)2005×
2003
2004
,
=(2004+1)×
2003
2004
,
=2004×
2003
2004
+
2003
2004
,
=2003+
2003
2004
,
=2003
2003
2004
;

(5)(45×
3
5
+5)÷
4
5
,
=(27+5)÷
4
5
,
=32×
5
4
,
=40;

(6)
7
3
+
2
3
×
6
5
,
=
7
3
+
4
5
,
=
47
15
.
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