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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