题目内容

计算下面各题
3
5
-
2
5
×
1
3
7
8
+
1
4
)÷
21
32
105×(
1
3
+
1
5
+
1
7
5
7
÷
3
14
-
2
7
÷
3
14
(1)
3
5
-
2
5
×
1
3

=
3
5
-
2
15

=
7
15

(2)(
7
8
+
1
4
)÷
21
32

=
36
32
×
32
21

=
12
7

(3)105×(
1
3
+
1
5
+
1
7

=105×
1
3
+105×
1
5
+105×
1
7

=35+21+15,
=71;
(4)
5
7
÷
3
14
-
2
7
÷
3
14

=
5
7
×
14
3
-
2
7
×
14
3

=
10
3
-
4
3

=2.
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