24÷29/30×(7/8+13/4-11/12-1/2)

问题描述:

24÷

29
30
×(
7
8
+1
3
4
-
11
12
-
1
2

24÷

29
30
×(
7
8
+1
3
4
-
11
12
-
1
2

=24÷
29
30
×(2
5
8
-
11
12
-
1
2

=24÷
29
30
×(1
17
24
-
1
2

=24÷
29
30
×1
5
24

=24×
30
29
×
29
24

=24×
29
24
×
30
29

=29×
30
29

=30.