0.27+9.9x0.27简便算法
问题描述：
0.27+9.9x0.27简便算法
答
原式=0.27+(10-0.1)*0.27=0.27+2.7-0.027=2.97-0.027=2.943
答
（1+9.9）*0.27这样算简便算法吗
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