41.2*8.1+1.1*12.5+53.7*1.9用简便方法计算_数学解答

41.2*8.1+1.1*12.5+53.7*1.9用简便方法计算

人气：398 ℃　时间：2019-10-09 10:25:33

解答

=41.2*8.1+1.1*12.5+(41.2+12.5)*1.9
=41.2*(8.1+1.9)+12.5*(1.1+1.9)
=41.2*10+12.5*3
=412+37.5
=449.5