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鍚嶅瓧鍙玊he Trachtenberg Speed System of Basic Mathematics锛堢壒鎷変酣浼鏍煎熀纭鏁板﹂熺畻锛
涔﹀湪杩欎拱http://www.ebay.com/sch/sis.html?_itemId=171149355746&_nkw=Trachtenberg+speed+system+Basic+Mathematics&_trksid=p2047675.m4099.l9146
浣嗘槸璇村疄璇濊繖涓绠楁槸骞朵笉澶濂斤紝杩囨椂浜嗭紝鐝犲績绠楃幇鍦ㄦ槸鍏璁ょ殑鏈蹇鐨勫惂锛屼綘鐪嬫渶寮哄ぇ鑴戦偅浜涙暟鍗佷綅鐨勪箻闄ゅ嚑绉掕В绛旓紝灏辨槸鐝犲績绠楋紝鍘熺悊鍙浠ョ湅锛http://blog.sina.com.cn/s/blog_5f2d67f90102wwt6.html
浣嗘槸鐪嬪畬浣犲氨瑙夊緱鍏跺疄鎰熻夐夯鐑︿簡銆
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鎴戝氨璁板緱鏈変竴涓鍙版咕鐨勭彔蹇冪畻鐢靛奖路
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銆婃í绌哄嚭涓栥
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