线段图具有直观、简明的特点,是解答分数应用题的重要辅助手段。在教学中应注意培养学生识图和画图的能力。首先要引导学生明确,反映部分量与总量间的关系,用一条线段表示;反映两数倍数关系,用两条线段表示。在此基础上,教师要结合题目,给学生讲清画图步骤。例苍海号捕鱼船五月份捕鱼2400吨,六月份比五月份多捕了1/4。六月份捕鱼多少吨? 引导学生明确,题中是六月份的产量与五月份的产量相比,因此,属于两数倍数关系,应画两条线 Line graph with intuitive, concise features, is an important auxiliary solution to the question scores application. In teaching should pay attention to cultivate students' ability and draw pictures. First of all, to guide students to clear, reflect the relationship between the amount of the amount and the total, with a line that; reflect the relationship between the two multiple, with two lines that. On this basis, teachers should combine the topic, clear drawing steps to students. For example, the Canghai fishing boat caught 2,400 tons of fish in May, more than a quarter of that in May. How many tons of fish to fish in June? To guide students to make it clear that the problem is that the output in June is compared with the output in May. Therefore,