如题所述
8.6x0.2+0.86x8
=8.6x0.2+8.6x0.8
=8.6x(0.2+0.8)
=8.6x1
=8.6
=8.6x0.2+8.6x0.8
=8.6x(0.2+0.8)
=8.6x1
=8.6
温馨提示:答案为网友推荐,仅供参考
第1个回答 2016-12-27
8.6*1.2+0.86*8=8.6*0.2+8.6*0.8=8.6*(0.2+0.8)=8.6*1=8.6