根据题意画出线段示意图,能使抽象的数学问题具体化,充分显示数量间的关系,找到解题途径。例1有两个水桶,小水桶能盛水4千克,大水桶能盛水11千克。不用有秤称,应该怎样使用这两个水桶,盛出5千克水来?分析与解:根据题中已知条件画出线段示意图。⒈小水桶盛满水,向大水桶连倒3次, Draw a schematic diagram of the line according to the problem, can abstract the mathematical problems, to fully show the relationship between the number of ways to find solutions. Example 1 has two buckets, a small bucket can hold 4 kg, a large bucket can hold 11 kg of water. Do not have scales, how should we use these two buckets, Sheng 5 kg of water? Analysis of reconciliation: According to the title of the known conditions drawn line schematic. ⒈ small bucket full of water, even down to the bucket 3 times,