问题 解答题
下面各题,怎样算简便就怎样算.
1
5
×8÷
4
5
3
5
+
1
2
×
4
5
5
6
÷
2
3
÷
5
6
5
8
+
5
6
)×
4
25
1-
7
9
÷
7
8
答案

(1)
1
5
×8÷
4
5

=
1
5
×8×
5
4

=2;

(2)

3
5
+
1
2
×
4
5
=
3
5
+
2
5

=1;

(3)

5
6
÷
2
3
÷
5
6

=

5
6
×
3
2
×
6
5

=

3
2

(4)(

5
8
+
5
6
)×
4
25
=
5
8
×
4
25
+
5
6
×
4
25

=

1
10
+
2
15

=

7
30

(5)1-

7
9
÷
7
8

=1-

7
9
×
8
7

=1-

8
9

=

1
9

单项选择题
问答题 简答题