49.5×10又5分之3-(56-二分之一)×0.6 简便计算

问题描述:

49.5×10又5分之3-(56-二分之一)×0.6 简便计算

=49.5*10.6-(56-0.5)*0.6
=49.5*(10+0.6)-(55.5*0.6)
=495+(49.5*0.6)-(55.5*0.6)
=495+0.6*(49.5-55.5)
=495+0.6*(-6)
=495-3.6
=491.4