题目内容

计算.
4
5
+
11
15
+
3
10
6-(
3
4
-
3
5
4
3
-(
2
5
+
3
10
5
9
+(
3
4
-
1
2
2
3
+
7
10
+
1
3
+
3
10
1-(
1
6
-
1
7
)+
1
6
(1)
4
5
+
11
15
+
3
10

=
48
60
+
44
60
+
18
60

=
11
6


(2)6-(
3
4
-
3
5

=6-
3
20

=5
17
20


(3)
4
3
-(
2
5
+
3
10

=
4
3
-
7
10

=
40
30
-
21
30

=
19
30


(4)
5
9
+(
3
4
-
1
2

=
5
9
+
1
4

=
20
36
+
9
36

=
29
30


(5)
2
3
+
7
10
+
1
3
+
3
10

=(
2
3
+
1
3
)+(
7
10
+
3
10

=1+1
=2;

(6)1-(
1
6
-
1
7
)+
1
6

=1-
1
6
+
1
7
+
1
6

=(1+
1
7
)+(
1
6
-
1
6

=1
1
7
+0
=1
1
7
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