题目内容

(1)
2
5
÷
1
5
×
1
6

(2)(
3
4
-
3
5
)÷
7
10

(3)
3
4
×
1
9
+
1
4
÷9
(4)5-(
3
10
÷
6
7
+
3
4
(1)
2
5
÷
1
5
×
1
6

=2×
1
6

=
1
3


(2)(
3
4
-
3
5
)÷
7
10

=
3
20
×
10
7

=
3
14


(3)
3
4
×
1
9
+
1
4
÷9,
=
3
4
×
1
9
+
1
4
×
1
9

=(
3
4
+
1
4
)×
1
9

=1×
1
9

=
1
9


(4)5-(
3
10
÷
6
7
+
3
4
),
=5-(
7
20
+
3
4
),
=5-
11
10

=3
9
10
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