Question

3．甲桶水重60千克，乙桶水重比甲桶水的$\frac{4}{5}$少$\frac{3}{5}$千克，乙桶水重47$\frac{2}{5}$千克．

Answer 1

分析 甲桶水重60千克，根據(jù)分?jǐn)?shù)乘法的意義，甲桶水量的$\frac{4}{5}$是60×$\frac{4}{5}$千克，又乙桶水重比甲桶水的$\frac{4}{5}$少$\frac{3}{5}$千克，則乙桶有60×$\frac{4}{5}$-$\frac{3}{5}$千克水．

解答 解：60×$\frac{4}{5}$-$\frac{3}{5}$
=48-$\frac{3}{5}$
=47$\frac{2}{5}$（千克）
答：乙桶水重47$\frac{2}{5}$千克．
故答案為：47$\frac{2}{5}$．

點評 首先根據(jù)分?jǐn)?shù)乘法的意義求出甲桶水的$\frac{4}{5}$是多少千克是完成本題的關(guān)鍵．