题目内容

计算下面各题,能简便的要简便计算.
7
9
+
2
7
×
5
9
5
9
×
2
5
÷
2
3
5
12
+
1
9
-
5
18
)×36
[1-(
1
5
+
2
3
)×
4
13
11
20
1
8
+
1
6
)÷
5
24
-
2
3
×
1
4
40
13
×(26×
3
40
(1)7×
7
9
+
2
7
×
5
9

=
49
9
+
10
63

=5
38
63


(2)
5
9
×
2
5
÷
2
3

=
2
9
÷
2
3

=
1
3


(3)(
5
12
+
1
9
-
5
18
)×36
=
5
12
×36+
1
9
×36-
5
18
×36
=15+4-10
=19-10
=9;

(4)[1-(
1
5
+
2
3
)×
4
13
11
20

=[1-
13
15
×
4
13
11
20

=[1-
4
15
11
20

=
11
15
÷
11
20

=1
1
3


(5)(
1
8
+
1
6
)÷
5
24
-
2
3
×
1
4

=
7
24
÷
5
24
-
2
3
×
1
4

=
7
5
-
1
6

=1
7
30


(6)
40
13
×(26×
3
40

=
40
13
×
3
40
×26
=
3
13
×26
=6.
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