问题 填空题
计算:[
3
5
+
2
5
×(1-
3
8
)]×20
=______.
答案

[

3
5
+
2
5
×(1-
3
8
)]×20,

=[

3
5
+
2
5
×
5
8
]×20,

=[

3
5
+
1
4
]×20,

=

3
5
×20+
1
4
×20,

=12+5,

=17.

故答案为:17.

填空题
填空题