41.2*8.1+11*1.25+53.7*1.9 怎样巧算?是最新的_数学解答

41.2*8.1+11*1.25+53.7*1.9 怎样巧算?
是最新的

人气：150 ℃　时间：2019-09-22 04:21:19

解答

=41.2*(10-8.1)+53.7*8.1+11*1.25
=53.7*8.1+41.2*10-41.2*8.1++11*1.25
=(53.7-41.2)*8.1+412+11*1.25
=12.5*8.1+1.1*1.25+412
=12.5*(8.1+1.1)+412
=12.5*9.2+412
=115+412
=527