Question

11．在$\frac{11}{9}$、$\frac{7}{2}$、$\frac{3}{5}$、$\frac{2}{3}$、$\frac{9}{9}$、$\frac{40}{15}$這些分?jǐn)?shù)中，真分?jǐn)?shù)有$\frac{3}{5}$、$\frac{2}{3}$，假分?jǐn)?shù)有$\frac{11}{9}$、$\frac{7}{2}$、$\frac{9}{9}$、$\frac{40}{15}$．

Answer 1

分析 （1）真分?jǐn)?shù)：分子比分母小的分?jǐn)?shù)，叫做真分?jǐn)?shù)．真分?jǐn)?shù)的分?jǐn)?shù)值小于1．
（2）假分?jǐn)?shù)：和真分?jǐn)?shù)相對，分子大于或者等于分母的分?jǐn)?shù)叫假分?jǐn)?shù)，假分?jǐn)?shù)大于1或等于1．

解答 解：在$\frac{11}{9}$、$\frac{7}{2}$、$\frac{3}{5}$、$\frac{2}{3}$、$\frac{9}{9}$、$\frac{40}{15}$這些分?jǐn)?shù)中，
真分?jǐn)?shù)有：$\frac{3}{5}$、$\frac{2}{3}$；
假分?jǐn)?shù)有：$\frac{11}{9}$、$\frac{7}{2}$、$\frac{9}{9}$、$\frac{40}{15}$；
故答案為：$\frac{3}{5}$、$\frac{2}{3}$；$\frac{11}{9}$、$\frac{7}{2}$、$\frac{9}{9}$、$\frac{40}{15}$．

點評 本題考查了真分?jǐn)?shù)、假分?jǐn)?shù)的區(qū)別，要注意分子等于分母的分?jǐn)?shù)也是假分?jǐn)?shù)．