36.1乘6.8+486乘0.32的简便运算

原式=36.1×（10-3.2）+48.6*3.2
=361-36.1*3.2+48.6*3.2
=361+（48.6-36.1）*3.2
=361+12.5*3.2
=361+1.25*8*4
=361+40
=401