Whether mathematics can be estimated is the learning content of the first volume of grade three. For example, Xiaoming goes to the store to buy badminton. Every badminton costs 6 yuan money, and Xiao Ming needs to buy 8 badminton. Is it enough for Xiao Ming to take 50 yuan?

Answer: For each badminton 6 yuan, you need to buy 8 shuttlecocks, 6×8=48 yuan, 48 is less than 50, and Xiao Ming and 50 yuan are enough. In fact, this problem is not difficult. Students in the third grade of primary school can do it. Their easy mistake is that they often forget to compare, that is, the comparison between 48 and 50.