58.76-(8.76-15)怎么算
问题描述:
58.76-(8.76-15)怎么算
答
简便算法么?
58.76-(8.76-15)
=58+0.76-(8+0.76-15)
=58+0.76-8-0.76+15
=58-8+15+0.76-0.76
=65