728*507+494*728-728的简便计算怎么算

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728*507+494*728-728的简便计算怎么算

728*507+494*728-728的简便计算怎么算
728*507+494*728-728的简便计算怎么算

728*507+494*728-728的简便计算怎么算
728*507+494*728-728
=728*(507+494-1)
=728*1000
=728000

728*507+494*728-728=728*(507+494-1)=728*1000=728000

728*507+494*728-728
=728*(507+494-1)
=728*1000
=728000

728*(507+494-1)=728*1000=728000

(730-2)*(500+7)+(500-6)*(730-2)-(730-2)
=【(730-2)*(500+7)-(730-2)】+(500-6)*(730-2)
=(730-2)*(500+7-1)+(500-6)*(730-2)
=(730-2)*(500+6)+(500-6)*(730-2)
=(730-2)*500
=730*500-2*500
=365000-1000
=364000