题目内容

5
11
-(
1
7
-
6
11
7
4
-
5
6
)÷
1
12
3
10
+(
4
7
+
1
2
)×
7
25
1
2
-(
3
4
-
3
5
)〕÷
7
10
(1)
5
11
-(
1
7
-
6
11
),
=
5
11
-
1
7
+
6
11

=
5
11
+
6
11
-
1
7

=1-
1
7

=
6
7


(2)(
7
4
-
5
6
)÷
1
12

=(
7
4
-
5
6
)×12,
=
7
4
×12-
5
6
×12,
=21-10,
=11;

(3)
3
10
+(
4
7
+
1
2
)×
7
25

=
3
10
+
4
7
×
7
25
+
1
2
×
7
25

=
3
10
+
4
25
+
7
50

=
15
50
+
8
50
+
7
50

=
3
5


(4)[
1
2
-(
3
4
-
3
5
)]÷
7
10

=[
1
2
-
3
20
7
10

=
7
20
÷
7
10

=
1
2
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