题目内容

下面各题怎样算简便就怎样算.
2
5
×15÷
5
8
1
4
+
3
4
÷
3
8
12
5
-
3
5
3
7
×
1
3
+
4
7
×
1
3
1
2
+
1
3
+
1
6
)×18.
(1)
2
5
×15÷
5
8

=
2
5
×15×
8
5

=
48
5


(2)
1
4
+
3
4
÷
3
8

=
1
4
+2,
=2
1
4


(3)4÷
12
5
-
3
5

=
5
3
-
3
5

=
16
15


(4)
3
7
×
1
3
+
4
7
×
1
3

=(
3
7
+
4
7
)×
1
3

=1×
1
3

=
1
3


(5)(
1
2
+
1
3
+
1
6
)×18,
=
1
2
×18+
1
3
×18+
1
6
×18,
=9+6+3,
=18.
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