Question

18．在$\frac{6}{7}$、$\frac{5}{8}$、$\frac{15}{25}$、$\frac{9}{4}$、$\frac{14}{15}$、$\frac{13}{31}$中，最簡(jiǎn)分?jǐn)?shù)有$\frac{6}{7}$、$\frac{5}{8}$、$\frac{9}{4}$、$\frac{14}{15}$、$\frac{13}{31}$；，假分?jǐn)?shù)有$\frac{9}{4}$．

Answer 1

分析 根據(jù)最簡(jiǎn)分?jǐn)?shù)、假分?jǐn)?shù)的意義，分?jǐn)?shù)的分子和分母只有公因數(shù)1的分?jǐn)?shù)叫做最簡(jiǎn)分?jǐn)?shù)；分?jǐn)?shù)的分子大于或等于分母的分?jǐn)?shù)叫做假分?jǐn)?shù)．據(jù)此解答．

解答 解：在$\frac{6}{7}$、$\frac{5}{8}$、$\frac{15}{25}$、$\frac{9}{4}$、$\frac{14}{15}$、$\frac{13}{31}$中，
最簡(jiǎn)分?jǐn)?shù)有：$\frac{6}{7}$、$\frac{5}{8}$、$\frac{9}{4}$、$\frac{14}{15}$、$\frac{13}{31}$；
假分?jǐn)?shù)有：$\frac{9}{4}$；
故答案為：$\frac{6}{7}$、$\frac{5}{8}$、$\frac{9}{4}$、$\frac{14}{15}$、$\frac{13}{31}$；$\frac{9}{4}$．

點(diǎn)評(píng) 此題考查的目的是理解掌握最簡(jiǎn)分?jǐn)?shù)、假分?jǐn)?shù)的意義及應(yīng)用．