题目内容

5
8
+
7
9
+
3
8

25
18
-
2
5
-
3
5

2
3
+
7
10
+
1
3
+
3
10

5
9
-
5
12
+
4
9

8
9
-(
1
5
-
1
9
)

5
12
+
11
15
-
6
15
+
7
12
.
(1)
5
8
+
7
9
+
3
8
,
=(
5
8
+
3
8
)+
7
9
,
=1+
7
9
,
=1
7
9
;

(2)
25
18
-
2
5
-
3
5
,
=
25
18
-(
2
5
+
3
5
),
=
25
18
-1,
=
7
18
;

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

(4)
5
9
-
5
12
+
4
9
,
=(
5
9
+
4
9
)-
5
12
,
=1-
5
12
,
=
7
12
;

(5)
8
9
-(
1
5
-
1
9
),
=
8
9
-
1
5
+
1
9
,
=(
8
9
+
1
9
)-
1
5
,
=1-
1
5
,
=
4
5
;

(6)
5
12
+
11
15
-
6
15
+
7
12
,
=(
5
12
+
7
12
)+(
11
15
-
6
15
),
=1+
1
3
,
=1
1
3
.
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