问题 解答题
递等式计算.(能简算的要简算)
4
25
÷
5
12

19÷
11
5
+3×
5
11

10÷[2×(
5
6
-
1
2
)].
答案

(1)2÷

4
25
÷
5
12

=2÷(

4
25
×
5
12
),

=2÷

1
15

=30;

(2)19÷

11
5
+3×
5
11

=(19+3)×

5
11

=22×

5
11

=10;

(3)10÷[2×(

5
6
-
1
2
)],

=10÷[2×

1
3
],

=10÷

2
3

=15.

单项选择题
单项选择题