Question

王爺爺家種的蘋(píng)果樹(shù)是梨樹(shù)的5倍．如果種了x棵梨樹(shù)，那么蘋(píng)果樹(shù)有

 

棵，蘋(píng)果樹(shù)和梨樹(shù)一共有

 

棵，蘋(píng)果樹(shù)比梨樹(shù)多

 

棵．

Answer 1

考點(diǎn)：用字母表示數(shù)

專(zhuān)題：用字母表示數(shù)

分析：要求蘋(píng)果樹(shù)的棵數(shù)，也就是求梨樹(shù)x棵的5倍，用乘法計(jì)算；用蘋(píng)果樹(shù)的棵數(shù)加上梨樹(shù)的棵數(shù)，就是蘋(píng)果樹(shù)和梨樹(shù)一共的棵數(shù)；用蘋(píng)果樹(shù)的棵數(shù)減去梨樹(shù)的棵數(shù)，就是蘋(píng)果樹(shù)比梨樹(shù)多的棵數(shù)．

解答： 解：x×5=5x（棵）
5x+x=6x（棵）
5x-x=4x（棵）．
答：蘋(píng)果樹(shù)有5x棵，蘋(píng)果樹(shù)和梨樹(shù)一共有6x棵，蘋(píng)果樹(shù)比梨樹(shù)多4x棵．
故答案為：5x，6x，4x．

點(diǎn)評(píng)：解題關(guān)鍵是找出數(shù)量關(guān)系，再列式解答．