har hittat min gamla "Hej matematik". Kanske bör skänka bort den? http://viskot.wordpress.com/2010/08/18/hillevi-engstrom-m-kan-inte-rakna/
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har hittat min gamla "Hej matematik". Kanske bör skänka bort den? http://viskot.wordpress.com/2010/08/18/hillevi-engstrom-m-kan-inte-rakna/