题目内容

3
4
+
5
12
-
11
24

23
28
+(
13
14
+
2
7
)

9
16
-
1
8
-
3
8

1
15
+
2
7
+
14
15
+
5
7

1-
3
7
-
4
7

1-(
1
6
-
1
7
)+
1
6
(1)
3
4
+
5
12
-
11
24

=
18
24
+
10
24
-
11
24

=
17
24


(2)
23
28
+(
13
14
+
2
7
),
=
23
28
+
34
28

=
57
28


(3)
9
16
-
1
8
-
3
8

=
9
16
-(
1
8
+
3
8
),
=
9
16
-
1
2

=
1
16


(4)
1
15
+
2
7
+
14
15
+
5
7

=(
1
15
+
14
15
)+(
2
7
+
5
7
),
=1+1,
=2;

(5)1-
3
7
-
4
7

=1-(
3
7
+
4
7
),
=1-1,
=0;

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

=1-
1
6
+
1
7
+
1
6

=(1+
1
7
)+(
1
6
-
1
6
),
=
8
7
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