题目内容

9×(
2
3
-
2
5
)÷
3
5
3
17
÷
3
4
+
3
17
×
4
3
(
1
2
+
2
3
)÷
3
4
-
2
3
8
9
×[
3
4
-(
7
16
-
1
4
)].
(1)9×(
2
3
-
2
5
)÷
3
5
,
=9×(
10
15
-
6
15
)÷
3
5
,
=9×
4
15
×
5
3
,
=4;

(2)
3
17
÷
3
4
+
3
17
×
4
3
,
=
3
17
×
4
3
+
3
17
×
4
3
,
=
3
17
×
4
3
×2,
=
8
17
;

(3)(
1
2
+
2
3
)÷
3
4
-
2
3
,
=(
3
6
+
4
6
)×
4
3
-
2
3
,
=
7
6
×
4
3
-
2
3
,
=
14
9
-
6
9
,
=
8
9
;

(4)
8
9
×[
3
4
-(
7
16
-
1
4
)],
=
8
9
×[
3
4
-(
7
16
-
4
16
)],
=
8
9
×[
12
16
-
3
16
],
=
8
9
×
9
16
,
=
1
2
.
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