简便计算 20.13×0.1+0.5×201.3+0.049×2013
问题描述:
简便计算 20.13×0.1+0.5×201.3+0.049×2013
答
=20.13x0.1+20.13x5+20.13x4.9
=20.13x(0.1+5+4.9)
=20.13x10
=201.3