七分之五乘十六除以二十一分之五 有简便计算吗,如果有怎样算?
问题描述:
七分之五乘十六除以二十一分之五 有简便计算吗,如果有怎样算?
答
5/7×16÷5/21
=5/7×16×21/5
=16×3
=48
答
5/7×16÷5/21=5/7×21/5×16=3×16=48
5/7×21/5 很容易算出得 3
答
5/7×16÷5/21
=5/7×21/5×16
=3×16
=48
答
5/7×16÷5/21
=5/7×16×21/5
=(5/7×21/5)×16
=3×16
=48
祝你学习进步!