Question

校園里有楊樹(shù)50棵，柳樹(shù)80棵，楊樹(shù)棵樹(shù)比柳樹(shù)少百分之多少？柳樹(shù)棵樹(shù)比楊樹(shù)多百分之多少？

Answer 1

考點(diǎn)：百分?jǐn)?shù)的實(shí)際應(yīng)用

專(zhuān)題：分?jǐn)?shù)百分?jǐn)?shù)應(yīng)用題

分析：先用楊樹(shù)的棵數(shù)減去柳樹(shù)的棵數(shù)求出兩種樹(shù)的棵數(shù)差，用差除以柳樹(shù)的棵數(shù)，就是楊樹(shù)棵數(shù)比柳樹(shù)少百分之幾，用差除以楊樹(shù)的棵數(shù)，就是柳樹(shù)比楊樹(shù)多百分之幾．

解答： 解：80-50=30（棵）
30÷80=37.5%

30÷50=60%
答：楊樹(shù)棵樹(shù)比柳樹(shù)少37.5%，柳樹(shù)棵樹(shù)比楊樹(shù)多60%．

點(diǎn)評(píng)：本題是求一個(gè)數(shù)是另一個(gè)數(shù)的百分之幾，關(guān)鍵是看把誰(shuí)當(dāng)成了單位“1”，單位“1”的量為除數(shù)．