125乘以2.5乘31加125乘以2.5的简便运算

问题描述:

125乘以2.5乘31加125乘以2.5的简便运算

=125乘以(2.5乘以31+2.5)
=125乘以[2.5乘以(31+1)]
=125乘以(2.5乘以32)
=125乘以80
=10000