45+4.5+0.45+0.045的简便计算

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45+4.5+0.45+0.045的简便计算45+4.5+0.45+0.045的简便计算45+4.5+0.45+0.045的简便计算45+4.5+0.45+0.045=45×(1+0.1+0.01+0

45+4.5+0.45+0.045的简便计算
45+4.5+0.45+0.045的简便计算

45+4.5+0.45+0.045的简便计算
45+4.5+0.45+0.045
=45×(1+0.1+0.01+0.001)
=45×1.111
=5×9.999
=5×10-5×0.001
=50-0.005
=49.995