数学题:养猪大户王师傅说他的猪卖75头

  • 时间:2020-05-01 11:05:58
  • 分类:数学世界
  • 阅读:110 次

数学题:养猪大户王师傅说他的猪卖75头,剩下的饲料可以喂20天,卖100头剩下的饲料可以喂25天,问王师傅总共喂了多少头猪?

数学题解答:这道题要求的是猪的总数,题中每头猪每天吃的饲料应该是按一定的量来计算的。两种所描述的两种情况中,剩下的饲料应该是相同的,可以利用这一点找到等量关系式。还有饲料的数量用猪的头数与天数的乘积来表示。

方程解答如下:设总共喂了x头猪。

(x – 75)×20 = (x – 100)× 25

展开后,得:20x – 1500 = 25x – 2500

方程两边同时减去20x,再同时加上1500,得:

5x – 1000 = 0

x=200

答:养猪大户王师傅总共养了200头猪。

推荐阅读:
Algorithm to Count the Largest Group of Digit Sums  How to Delete Columns to Make Sorted Table?  How to Check If a Integer is a Strobogrammatic Number?  How to Find Pivot Index of Array?  The Image Flood Fill Algorithm (C++)  How to Clone a Graph in C++/Java using Depth First Search Algori  The Unique Morse Code Words Algorithm  The Algorithm to Find Anagram Mappings between Two Arrays  How to Write More Readable Blog Posts  Due.com Review: It Really Is An Easy Way to Keep Track of Your I 
评论列表
添加评论