问题 解答题
计算有捷径.
8
25
×
3
4
×
5
6
2
15
×
1
6
+
5
6
×
2
15
5
7
×5×
14
5
答案

(1)

8
25
×
3
4
×
5
6

=

6
25
×
5
6

=

1
5

(2)

2
15
×
1
6
+
5
6
×
2
15

=

2
15
×(
1
6
+
5
6

=

2
15
×1

=

2
15

(3)

5
7
×5×
14
5

=

5
7
×(5×
14
5

=

5
7
×14

=10

单项选择题
单项选择题