41.2*8.1+11*1.25+53.7*1.9的简算_数学解答

41.2*8.1+11*1.25+53.7*1.9的简算

人气：111 ℃　时间：2019-10-08 16:50:36

解答

=41.2*8.1+11*1.25+(41.2+12.5)*1.9
=41.2*(8.1+1.9)+11*1.25+12.5*1.9
=412+12.5*(1.1+1.9)
=412+12.5*3
=412+37.5
=449.5