问1道数学计算题
问题描述:
问1道数学计算题
0.999×1.3-0.111×2.7
答
原式=9*0.111*1.3-0.111*2.7
=(9*0.3+9*1)*0.111-0.111*2.7
=2.7*0.111+0.999-0.111*0.27
=0.999