问题 解答题
计算(能简算的要简算).  
5
6
÷(1-
9
20
)×
1
5

2
5
×
6
11
+40%×
5
11

3
7
-
3
7
÷3                
 
7
4
×
5
8
+
1
4
÷
8
5
答案

(1)

5
6
÷(1-
9
20
)×
1
5

=

5
6
÷
11
20
×
1
5

=

50
33
×
1
5

=

10
33

(2)

2
5
×
6
11
+40%×
5
11

=

2
5
×(
6
11
+
5
11
),

=

2
5
×1,

=

2
5

(3)3÷

3
7
-
3
7
÷3,

=7-

1
7

=6

6
7

(4)

7
4
×
5
8
+
1
4
÷
8
5

=

5
8
×(
7
4
+
1
4
),

=

5
8
×2,

=1

1
4

单项选择题
问答题 简答题