Question

14．甲數(shù)是乙數(shù)的$\frac{2}{5}$，乙數(shù)是丙數(shù)的$\frac{3}{8}$，丙數(shù)是6，甲數(shù)是$\frac{9}{10}$．

Answer 1

分析 丙數(shù)是6，乙數(shù)是丙數(shù)的$\frac{3}{8}$，也就是6的$\frac{3}{8}$，即6×$\frac{3}{8}$=$\frac{9}{4}$；甲數(shù)是乙數(shù)的$\frac{2}{5}$，也就是$\frac{9}{4}$的$\frac{2}{5}$，即$\frac{9}{4}$×$\frac{2}{5}$．

解答 解：6×$\frac{3}{8}$×$\frac{2}{5}$
=$\frac{9}{4}$×$\frac{2}{5}$
=$\frac{9}{10}$．
答：甲數(shù)是$\frac{9}{10}$．
故答案為：$\frac{9}{10}$．

點(diǎn)評(píng) 根據(jù)題意，先弄清運(yùn)算順序，然后再列式進(jìn)行解答．