[背景与主题]笔者在小学四年级第一学期设计、开发了“我们去秋游”实践与综合应用活动。这次实践活动是让学生在秋游之前计算一下活动中每人要花多少钱,也就是制定秋游活动预算方案。要计算每人花的钱数,又要事先到社会上搞些调查了解、收集资料,让学生接触社会,从现实生活中提出数学问题。[配套教材]苏教版九年义务教育六年制小学教科 [Background and Theme] The author designed and developed the “We Go Autumn Tour” practice and comprehensive application activities in the first semester of the fourth grade of primary school. This practice is to allow students to calculate how much each person spends during the fall tour, which is to formulate a budget plan for autumn tour activities. To calculate the amount of money spent per person, we must also conduct some surveys and understandings beforehand in the community to collect information so that students can come into contact with society and raise mathematical problems from real life. [Supporting materials] Sujiao version of nine-year compulsory education six-year primary school teaching