Question

14．分母是9的最簡(jiǎn)真分?jǐn)?shù)有$\frac{1}{9}$、$\frac{2}{9}$、$\frac{4}{9}$、$\frac{5}{9}$、$\frac{7}{9}$、$\frac{8}{9}$．

Answer 1

分析 分母是9的真分?jǐn)?shù)有$\frac{1}{9}$、$\frac{2}{9}$、$\frac{3}{9}$、$\frac{4}{9}$、$\frac{5}{9}$、$\frac{6}{9}$、$\frac{7}{9}$、$\frac{8}{9}$，其中$\frac{3}{9}$能化簡(jiǎn)為$\frac{1}{3}$，$\frac{6}{9}$能化簡(jiǎn)為$\frac{2}{3}$，所以最簡(jiǎn)真分?jǐn)?shù)只有6個(gè)，因此得解．

解答 解：分母是9的最簡(jiǎn)真分?jǐn)?shù)有$\frac{1}{9}$、$\frac{2}{9}$、$\frac{4}{9}$、$\frac{5}{9}$、$\frac{7}{9}$、$\frac{8}{9}$，共6個(gè)；
故答案為：$\frac{1}{9}$、$\frac{2}{9}$、$\frac{4}{9}$、$\frac{5}{9}$、$\frac{7}{9}$、$\frac{8}{9}$．

點(diǎn)評(píng) 此題主要考查最簡(jiǎn)真分?jǐn)?shù)的意義以及分?jǐn)?shù)的化簡(jiǎn)．