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
答
+3 4
+4 8
+5 16
+6 32
+7 64
+8 128
9 256
=
×(3+2+1 4
+5 4
+7 16
+8 32
)9 64
=
×(5+1 4
)133 64
=
×1 4
453 64
=
453 256
故答案为:
.453 256