在小学数学题中,有些难以下手的问题,需通过对题目条件的分析、推导、缩小答案的存在范围,才能解答。其解题思想就是“缩小范围,步步逼近”。【例1】学校组织若干人去春游,先乘汽车,需要定员60人的汽车4辆;而后乘船,需要定员70人的船3条。到达目的地后分组活动,分 In primary school mathematics, some difficult to start with the problem, through the analysis of the conditions of the subject, derive, narrow the scope of the answer in order to answer. The problem-solving idea is “narrowing the range, step by step approaching ”. [Example 1] The school organized a group of people to go on a spring break, traveling first by car and requiring 4 cars with a capacity of 60 people; then by boat, there were 3 ships requiring 70 people. After reaching the destination group activities, points