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Old 19 ÁÕ¹Ò¤Á 2010, 20:18
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A School Arithmetic ËÒÂä»ä˹àÅèÁ¹Ö§ËÃ×Íà»ÅèÒ¤ÃѺ.

ÍÂèÒ§·Õè¼Áà¤Âà¢Õ¹äÇé¤ÃѺ ÁѹÁÕÍÂÙè·ÕèËéͧÊÁØ´¤³ÐÇÔÈÇШØÌÒ â«¹Ë¹Ñ§Ê×Íà¡èÒ·ÕèµÍ¹¹Õé¹èÒ¨Ðŧ¶Ñ§¢ÂÐä»ËÁ´áÅéÇËÃ×Íà»ÅèÒ ¶éÒºÃóÒÃѡɳìäÁèàË繤س¤èÒËÃ×ͪÓÃØ´¨¹ÃÑ¡ÉÒäÁèäËÇ µÍ¹ã¡Åé¨Ð¨º¼Á´Ù Áѹà»ç¹Ë¹Ñ§Ê×Í·ÕèäÁèÁÕã¤Ãä»áµÐµéͧàÅ ¼Áä»á§Ðá¡Ð»Ñ´½Øè¹ÁÒ¶èÒÂàÍ¡ÊÒúҧàÅèÁ ºÒ§àÅèÁÍÂèÒ§ school geometry ªÓÃØ´¨¹¶èÒÂàÍ¡ÊÒÃäÁèä´é

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