小明、小亮和小丽是好朋友,他们组成一个学习小组,经常在一起研究问题。一天,小明拿着一道爸爸出的题,让两位好朋友看。大家商量好,自己独立解答,再给大家讲解,看谁的方法好。【题目】一堆煤,原计划每天烧6吨,可以烧96天。由于改建了炉灶,每天节约1.2吨,这堆煤可以烧多少天?不到10分钟,大家都解答完毕。小丽说:因为原计划每天烧6吨, Xiao Ming, Xiao Liang and Mary are good friends, they form a learning group, often together to study the problem. One day, Xiao Ming took a father out of the question, so that two good friends to see. We discuss well, their own independent answer, give you explain, to see who the method is good. [Topic] a pile of coal, the original plan to burn 6 tons a day, you can burn 96 days. As a result of rebuilding the stove, save 1.2 tons a day, how many days can burn this pile of coal? Less than 10 minutes, we all completed. Mary said: Because the original plan to burn 6 tons a day,