0.4+0.8+1.6+.+25.6+51.2 简算

问题描述:

0.4+0.8+1.6+.+25.6+51.2 简算

0.4+0.8+1.6+.+25.6+51.2
=(0.4+51.2)×128/2
=51.6×64
=3302.4