> 数学 >
1
4
+
1
28
+
1
70
+
1
130
+
1
208
=______.
人气:132 ℃ 时间:2020-03-28 09:09:33
解答
1
4
+
1
28
+
1
70
+
1
130
+
1
208

=(1-
1
4
+
1
4
-
1
7
+
1
7
-
1
10
+
1
10
-
1
13
+
1
13
-
1
16
)×
1
3

=(1-
1
16
)×
1
3

=
15
16
×
1
3

=
5
16
推荐
猜你喜欢
© 2024 79432.Com All Rights Reserved.
电脑版|手机版