Question

14．楊樹(shù)的棵數(shù)比柳樹(shù)多$\frac{1}{4}$，楊樹(shù)的棵數(shù)就是柳樹(shù)的$\frac{5}{4}$，柳樹(shù)的棵數(shù)比楊樹(shù)少$\frac{1}{5}$．

Answer 1

分析 （1）把柳樹(shù)的棵數(shù)看作單位“1”，根據(jù)題意，可知：楊樹(shù)的棵數(shù)是柳樹(shù)的1+$\frac{1}{4}$=$\frac{5}{4}$；
（2）把楊樹(shù)的棵數(shù)看作單位“1”，用柳樹(shù)比楊樹(shù)少的棵數(shù)除以楊樹(shù)的棵數(shù)，即為柳樹(shù)比楊樹(shù)少的幾分之幾．

解答 解：（1）1+$\frac{1}{4}$=$\frac{5}{4}$
（2）$\frac{1}{4}$÷$\frac{5}{4}$=$\frac{1}{5}$．
答：楊樹(shù)的棵數(shù)是柳樹(shù)的$\frac{5}{4}$，柳樹(shù)比楊樹(shù)的棵數(shù)少$\frac{1}{5}$．
故答案為：$\frac{5}{4}$，$\frac{1}{5}$．

點(diǎn)評(píng) 解決此題關(guān)鍵是明確單位“1”的量，進(jìn)而根據(jù)基本數(shù)量關(guān)系列式解答．