问题 解答题
下面各题,怎样算简便就怎样算:
1
3
÷(
2
3
-
2
5
)×
3
5
12
15
×(
5
6
+
3
4
)+
4
5


7
9
÷
11
5
+
2
9
×
5
11
1
2
-(
3
4
-
3
5
)
÷
7
10
答案

1
3
÷(
2
3
-
2
5
)×
3
5

=

1
3
÷
4
15
×
3
5

=

1
3
×
15
4
×
3
5

=

3
4

12
15
×(
5
6
+
3
4
)+
4
5

=

12
15
×
5
6
+
12
15
×
3
4
+
4
5

=

2
3
+
3
5
+
4
5

=

31
15

7
9
÷
11
5
+
2
9
×
5
11

=(

7
9
+
2
9
)×
5
11

=1×

5
11

=

5
11

1
2
-(
3
4
-
3
5
7
10

=

1
2
-
3
20
×
10
7

=

1
2
-
3
14

=

2
7

单项选择题
判断题