大学生に四則演算を教える理由　数学者が見てきた「教育の犠牲者」

   

Array ( [0] => http://ojighi.blog.jp/index.rdf [1] => http://blog.livedoor.jp/glintbooster/index.rdf [2] => http://kakutoumania-sokuhou.xyz/index.rdf [3] => https://antenamtm.com/feed/ [4] => https://shinycolors.xyz/index.rdf [5] => http://rai-den.com/index.rdf/ [6] => http://bokumato.site/feed/ [7] => http://chansoku.com/index.rdf [8] => http://omoshiroi-hanashi.com/feed [9] => http://animesoku.com/index.rdf [10] => https://hoge5ch.info/index.rdf [11] => http://katasumisokuhou.blog.jp/index.rdf [12] => https://newswidechannel.blog.jp/index.rdf https://techsider.net/feed/ )