一、激发学习兴趣,提高估算意识在以前的数学教材中,估算只是作为选学内容,即使学生想学,教师也不一定教,因为考试对选学内容不作要求,并且估算在教材内容设计上也比较乏味。但是,数学课程标准明确指出:“估算在日常生活与数学学习中有着十分广泛的应用,培养学生的估算 First, to stimulate interest in learning and improve the sense of estimation In the previous math textbooks, the estimation is only as the elective content, even if students want to learn, teachers do not necessarily teach, because the exam does not require the content of the elective, and estimated in the design of the textbook content Also more boring. However, the standard of mathematics curriculum clearly states: ”Estimation has a very wide range of applications in daily life and maths learning to develop students’ estimates