23*97 69怎么简便算
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![23*97 69怎么简便算](/uploads/image/z/556308-36-8.jpg?t=23%2A97+69%E6%80%8E%E4%B9%88%E7%AE%80%E4%BE%BF%E7%AE%97)
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23*97 69怎么简便算
23*97 69怎么简便算
23*97 69怎么简便算
23×9769
=23×(10000-231)
=23×10000-23×231
=230000-23×(230+1)
=230000-23×230-23
=230000-23×(23×10)-23
=230000-23×23×10-23
=230000-5290-23
=224687