题目内容

计算下面各题,能简算的要简算.
11
12
-
3
8
+
1
8
7
8
-(
1
17
-
1
8
5-
4
7
-
3
7
2
3
+(
3
5
-
1
2
15
16
-(
3
16
+
1
4
4
9
+
3
10
+
5
9
+
7
10
11
12
-
3
8
+
1
8

=
13
24
+
1
8

=
2
3


7
8
-(
1
17
-
1
8

=
7
8
-
1
17
+
1
8

=
7
8
+
1
8
-
1
17

=1-
1
17

=
16
17


5-
4
7
-
3
7

=5-(
4
7
+
3
7
),
=5-1,
=4;

2
3
+(
3
5
-
1
2

=
2
3
+
1
10

=
23
30


15
16
-(
3
16
+
1
4

=
15
16
-
3
16
-
1
4

=
3
4
-
1
4

=
1
2


4
9
+
3
10
+
5
9
+
7
10

=(
4
9
+
5
9
)+(
3
10
+
7
10
),
=1+1,
=2.
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