Question

8．$\frac{2}{5}$、$\frac{3}{8}$、$\frac{9}{6}$、$\frac{7}{5}$、$\frac{6}{8}$、$\frac{4}{6}$這六個分?jǐn)?shù)中，假分?jǐn)?shù)是$\frac{9}{6}$、$\frac{7}{5}$，真分?jǐn)?shù)是$\frac{2}{5}$、$\frac{3}{8}$、$\frac{6}{8}$、$\frac{4}{6}$，同分母的是$\frac{2}{5}和\frac{7}{5}$、$\frac{3}{8}$和$\frac{6}{8}$、$\frac{9}{6}$和$\frac{4}{6}$．

Answer 1

分析 ①假分?jǐn)?shù)的定義為：分子大于或等于分母的分?jǐn)?shù)為假分?jǐn)?shù)，據(jù)此判斷；
②真分?jǐn)?shù)的意義：分子小于分母的分?jǐn)?shù)叫做真分?jǐn)?shù)，據(jù)此解答；
③同分母就是分母相同．

解答 解：①假分?jǐn)?shù)：$\frac{9}{6}、\frac{7}{5}$

②真分?jǐn)?shù)：$\frac{2}{5}、\frac{3}{8}、\frac{6}{8}、\frac{4}{6}$

③同分母的是：$\frac{2}{5}和\frac{7}{5}$；$\frac{3}{8}和\frac{6}{8}$；$\frac{9}{6}和\frac{4}{6}$．
故答案為：$\frac{9}{6}、\frac{7}{5}$；$\frac{2}{5}、\frac{3}{8}、\frac{6}{8}、\frac{4}{6}$；$\frac{2}{5}和\frac{7}{5}$；$\frac{3}{8}和\frac{6}{8}$；$\frac{9}{6}和\frac{4}{6}$．

點評 本題考查了學(xué)生對于真分?jǐn)?shù)、假分?jǐn)?shù)定義的理解．