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在小学数学中,求最小公倍数主要是用于分数的通分。但有时也可运用求最小公倍数的方法,解决一些应用题。 例1.人民公园是1、3路汽车的起点站。1路汽车每3分钟发车一次,3路汽车每5分钟发车一次。这两路汽车同时发车以后,至少再过多少分钟又同时发车? 思路:从人民公园开出的1、3路汽车,从第一次同时开出到第二次同时开出,所间隔的时间数必须能被3、5整除,即必须是3、5的公倍数;又因为要求的是这两路汽车第一次同时发车到第二次同时发车中间经过的时间至少是多少分钟,所以这个间隔的时间应是3、5的最小公倍数,即15分钟。
In elementary mathematics, the least common multiple is mainly used for the fractional pass. But sometimes you can use the least common multiple to solve some problems. Example 1. People's Park is the starting point of 1,3 cars. 1 car starts every 3 minutes, 3 cars start every 5 minutes. These two cars at the same time after the departure, at least a few minutes and at the same time departure? Ideas: From the People's Park out of 1,3 cars, from the first out simultaneously to the second at the same time, the time interval The number must be divisible by 3, 5, that is, it must be a common multiple of 3, 5, and because the requirement is that the two cars at the same time the first departure to the second at the same time the middle of the departure time is at least minutes, so this interval The time should be the least common multiple of 3,5, ie 15 minutes.