计算:3/4+4/8+5/16+6/32+7/64+8/128+9/256=_.

问题描述:

计算:

3
4
+
4
8
+
5
16
+
6
32
+
7
64
+
8
128
+
9
256
=______.

3
4
+
4
8
+
5
16
+
6
32
+
7
64
+
8
128
+
9
256

=
1
4
×(3+2+
5
4
+
7
16
+
8
32
+
9
64

=
1
4
×(5+
133
64

=
1
4
×
453
64

=
453
256

故答案为:
453
256