【导学课题】九年义务教育六年制小学数学第十册第１４５页、１４６页“分数化小数”。内容包括“分母不是１０、１００、１０００……的分数化成小数的法则”和“一个最简分数能否化成有限小数的规律”。重点和难点是理解和运用一个最简分数能否化成有限小数的规律。【导学思? 【Subject】 guided nine-year compulsory education six-year primary school mathematics tenth volumes 145, 146 “fractional decimal.” The contents include “the law of fractionalization of decimal notation of denominator of 10, 100, 1000 ...” and “the law of whether a simplest fraction can be converted into a finite decimal”. The key and difficult point is to understand and apply a rule that the simplest fraction can be transformed into a finite fraction. 【Guide learn thinking?