Question

校園里有水杉樹(shù)24棵，松樹(shù)的棵數(shù)是水杉樹(shù)的3倍．水杉樹(shù)和松樹(shù)一共有多少棵？水杉樹(shù)比松樹(shù)少多少棵？

Answer 1

分析：根據(jù)題意可知水杉樹(shù)的棵數(shù)是單位“1”，水杉樹(shù)和松樹(shù)的總棵數(shù)就是水杉樹(shù)的（1+3）倍，水杉樹(shù)比松樹(shù)少的棵樹(shù)，就是水杉樹(shù)的（3-1）倍．據(jù)此解答．

解答：解：24×（3+1），
=24×4，
=96（棵），
24×（3-1），
=24×2，
=48（棵）．
答：水杉樹(shù)和松樹(shù)一共有96棵，水杉樹(shù)比松樹(shù)少48棵．

點(diǎn)評(píng)：本題主要考查了學(xué)生根據(jù)和差問(wèn)題和和倍問(wèn)題解答問(wèn)題的能力．