98乘31如何简便计算?
问题描述:
98乘31如何简便计算?
答
98*31
=(100-2)*31
=100*31-2*31
=3100-62
=3038
98乘31如何简便计算?
98*31
=(100-2)*31
=100*31-2*31
=3100-62
=3038