278x46+78x54 用简便方法怎么算 76X1O278x46十78x54简便运算
作者&投稿：贠娴 （若有异议请与网页底部的电邮联系）
278x46+78x54
=(200+78)x46+78x54
=200*46+78*(46+54)
=200*46+7800
=9200+7800
=17000
278x46+78x54
=（200+78）x46+78x54
=200x46+（78x46+78x54 ）
=9200+78x（46+54）
9200+7800
17000
278x46+78x54
=278x(46+54)
=278x100
=27800
=200x46+78x46+78x54
=9200+7800
=17000
2012-03-24
278x46+78x54
=（200+78）x46+78x54
=200x46+（78x46+78x54 ）
=9200+78x（46+54）
9200+7800
17000
278x46+58x54的简便方法~
=(200+78)x46+78x54
=200*46+78*(46+54)
=200*46+7800
=9200+7800
=17000
278x46+78x54
=（200+78）x46+78x54
=200x46+（78x46+78x54 ）
=9200+78x（46+54）
9200+7800
17000
278x46+78x54
=278x(46+54)
=278x100
=27800
=200x46+78x46+78x54
=9200+7800
=17000
2012-03-24
278x46+78x54
=（200+78）x46+78x54
=200x46+（78x46+78x54 ）
=9200+78x（46+54）
9200+7800
17000
278x46+58x54的简便方法~
278x46+58x54
=278x（100-54）+58x54
=278x100-278x54+58x54
=27800-（278-58）x54
=27800-220x54
=27800-200x54-20x54
=27800-10800-1080
=17000-1080
=15920
76x102-78x46+78x54
=78x102-2x102-78x(46+54)
=78x102-2x102-78x100
=78x2-2x102
= -48
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