Question

2．$\frac{2}{5}$，$\frac{7}{4}$，$\frac{11}{11}$，$\frac{9}{45}$，$\frac{3}{7}$，$\frac{9}{5}$真分?jǐn)?shù)有$\frac{2}{5}$、$\frac{9}{45}$、$\frac{3}{7}$，假分?jǐn)?shù)有$\frac{7}{4}$、$\frac{11}{11}$、$\frac{9}{5}$．

Answer 1

分析 根據(jù)真分?jǐn)?shù)的意義，分子小于分母的分?jǐn)?shù)是真分?jǐn)?shù)；根據(jù)假分?jǐn)?shù)的意義，分子大于或等于分母的分?jǐn)?shù)是假分?jǐn)?shù)．依據(jù)意義即可判定．

解答 解：真分?jǐn)?shù)有：$\frac{2}{5}$、$\frac{9}{45}$、$\frac{3}{7}$；
假分?jǐn)?shù)有：$\frac{7}{4}$、$\frac{11}{11}$、$\frac{9}{5}$．
故答案為：$\frac{2}{5}$、$\frac{9}{45}$、$\frac{3}{7}$，$\frac{7}{4}$、$\frac{11}{11}$、$\frac{9}{5}$．

點評 此題是考查真、假分?jǐn)?shù)的意義，屬于基礎(chǔ)知識．關(guān)鍵是記住意義，根據(jù)意義即可解答．