63×6.4+3.6×64用简便算法怎么算？
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63×6.4+3.6×64
=63×6.4+36×0.1×64
=63×6.4+36×6.4
=(63+36)×6.4
=99×6.4
=(100-1)×6.4
=100×6.4-1×6.4
=640-6.4
=633.6
=63×6.4+36×0.1×64
=63×6.4+36×6.4
=(63+36)×6.4
=99×6.4
=(100-1)×6.4
=100×6.4-1×6.4
=640-6.4
=633.6
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