题目内容

1
4
×
3
5
÷
9
8
3
5
÷
1
20
÷
3
4
(
2
3
-
1
4
)÷
5
6
5
8
÷(
1
2
+
1
4
)
8
13
÷7+
1
7
×
6
13
1
2
-
1
8
÷
5
12
.
(1)
1
4
×
3
5
÷
9
8
,
=
1
4
×
8
9
×
3
5
,
=
2
9
×
3
5
,
=
2
15
;

(2)
3
5
÷
1
20
÷
3
4
,
=12÷
3
4
,
=16;

(3)(
2
3
-
1
4
)÷
5
6
,
=
5
12
×
6
5
,
=
1
2
;

(4)
5
8
÷(
1
2
+
1
4
),
=
5
8
÷
3
4
,
=
5
6
;

(5)
8
13
÷7+
1
7
×
6
13
,
=
8
13
×
1
7
+
1
7
×
6
13
,
=(
8
13
+
6
13
)×
1
7
,
=
14
13
×
1
7
,
=
2
13
;

(6)
1
2
-
1
8
÷
5
12
,
=
1
2
-
3
10
,
=
1
5
.
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