31.6/0.5的简便算法
问题描述:
31.6/0.5的简便算法
答
31.6/0.5
=31.6÷1/2
=(30+1.6)×2
=30×2+1.6×2
=60+3.2
=63.2
答
一个数÷0.5 相当于这个数×2
所以 31.5/0.5=31.6×2=63.2
答
31.6/0.5
=31.6×2/0.5×2
=63.2/1
=63.2