数学课程标准指出:学生的数学学习内容应当是现实的、有意义的、富有挑战性的,这些内容要有利于学生主动的进行观察、实验、猜测、验证、推理与交流等数学活动。要切实开展有效学习,首先要调动学生的学习积极性,使他们产生对知识的渴望。创设问题情境是促使学生开展有效学习的有力手段。下面就创设问题情境,开展有效学习谈谈自己 The mathematics curriculum standard states that students ’mathematics learning content should be realistic, meaningful and challenging, which should be conducive to students’ initiative in mathematical activities such as observation, experiment, speculation, verification, reasoning and communication. To effectively carry out effective learning, we must first mobilize the enthusiasm of students so that they will have the desire for knowledge. Creating a problematic situation is a powerful way to motivate students to learn effectively. Here to create a problem situation, carry out effective learning to talk about yourself