简便计算 20.13×0.1+0.5×201.3+0.049×2013

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简便计算 20.13×0.1+0.5×201.3+0.049×2013

简便计算 20.13×0.1+0.5×201.3+0.049×2013
简便计算 20.13×0.1+0.5×201.3+0.049×2013

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