题目内容

脱式计算.
(1)
1
3
÷(
2
3
-
2
5
)×
3
5

(2)
1
2
-(
3
4
-
3
5
)÷
7
10

(3)
7
9
÷
11
5
+
2
9
×
5
11
(1)
1
3
÷(
2
3
-
2
5
)×
3
5

=
1
3
÷
4
15
×
3
5

=
5
4
×
3
5

=
3
4


(2)
1
2
-(
3
4
-
3
5
)÷
7
10

=
1
2
-
3
20
÷
7
10

=
1
2
-
3
14

=
2
7


(3)
7
9
÷
11
5
+
2
9
×
5
11

=(
7
9
+
2
9
)×
5
11

=1×
5
11

=
5
11
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