问题 解答题
用自己喜欢的方法计算
1
3
+
1
4
÷
1
24
  
 25×(
9
7
×40%)×
7
9
  
5
8
+
5
7
+
2
5
×
1
4
  
  
1
50
+(1-
2
5
)+
3
20
答案

(1)(

1
3
+
1
4
÷
1
24

=(

1
3
+
1
4
)×24,

=

1
3
×24+
1
4
×24,

=8+6,

=14;

(2)25×(

9
7
×40%)×
7
9

=(25×40%)×(

9
7
×
7
9
),

=10×1,

=10;

(3)

5
8
+
5
7
+
2
5
×
1
4

=

5
8
+
5
7
+
1
10

=

75
56
+
1
10

=

403
280

(4)

1
50
+(1-
2
5
)+
3
20

=

1
50
+
3
5
+
3
20

=

31
50
+
3
20

=

77
100

单项选择题 案例分析题
单项选择题