3.9*0.309/0.26的简便算法
问题描述:
3.9*0.309/0.26的简便算法
答
3.9*0.309/0.26
=39*3.09/26
=3*13*3.09/2*13
=9.27/2
=4.635
答
3.9*0.309/0.26
=39/26*3.09
=3/2*3.09
=4.635