《节约能源》是在学生学习了小数四则混合运算后,安排给他们的一次调查、统计、交流的实践活动。这样安排是遵循数学源于生活、寓于生活、用于生活的理念,从学生直接接触的生活实例出发,诱发、培养、发展学生学习数学的兴趣,使他们带着浓厚的兴趣参与调查活动,在活动中发现新知识,体验新观点,进一步激发学生学习数学的兴趣。教师应充分调动学生参与 Energy Conservation is a practical activity for students to arrange a survey, statistics and exchange after they have learned the four mixed arithmetic operations. This arrangement follows the concept that mathematics is derived from life and lives in which it is used for living. From the examples of life that students come into direct contact with, it induces, nurtures and develops students’ interest in math and makes them take part in investigations with keen interest. Discovering new knowledge and experiencing new ideas during the activity will further arouse students’ interest in learning mathematics. Teachers should fully mobilize students to participate