0.12+0.14+0.16+0.18…+0.88怎么算
问题描述:
0.12+0.14+0.16+0.18…+0.88怎么算
0.12+0.14+0.16+0.18…+0.88这个怎么算.给个详细的计算方法.
答
0.12+0.14+0.16+0.18…+0.88
=(12+14+16+18…+88)/100
=(12+88)*39/200
=39/2
=19.5