Question

18．果園里有三種果樹(shù)，梨樹(shù)的棵數(shù)是蘋(píng)果樹(shù)的$\frac{2}{3}$，桃樹(shù)的棵數(shù)是梨樹(shù)的$\frac{2}{5}$，已知桃樹(shù)60棵，蘋(píng)果樹(shù)有多少棵？

Answer 1

分析 先把梨樹(shù)的棵數(shù)看作單位“1”，桃樹(shù)60棵是梨樹(shù)的$\frac{2}{5}$，用除法即可得梨樹(shù)的棵數(shù)，再把蘋(píng)果樹(shù)的棵數(shù)看作單位“1”，梨樹(shù)的棵數(shù)是蘋(píng)果樹(shù)的$\frac{2}{3}$，用除法即可得蘋(píng)果樹(shù)有多少棵．

解答 解：60÷$\frac{2}{5}$÷$\frac{2}{3}$
=150÷$\frac{2}{3}$
=225（棵）
答：蘋(píng)果樹(shù)有225棵．

點(diǎn)評(píng) 本題考查了分?jǐn)?shù)除法應(yīng)用題，關(guān)鍵是單位“1”的確定．