0.27+9.9x0.27简便算法
问题描述:
0.27+9.9x0.27简便算法
答
0.27+9.9x0.27
=0.27+(10-0.1)x0.27
=0.27+10x0.27-0.27x0.1
=0.27+2.7-0.027
=2.943