9.9*47.6+47.6简便方法,
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9.9*47.6+47.6简便方法,
原式
=(10-0.1)*47.6+47.6
=476-4.76+47.6
=476+(47.6-4.76)
=476+(42.6+5-4.76)
=476+42.6+0.24
=476+42.84=518.84
9.9*47.6+47.6简便方法,
原式
=(10-0.1)*47.6+47.6
=476-4.76+47.6
=476+(47.6-4.76)
=476+(42.6+5-4.76)
=476+42.6+0.24
=476+42.84=518.84