五年制小学教学教材五册41页《练习十一》的第12题,是一道渗透了集合思想的思考题。为帮助老师们深入地理解和掌握这道题目,笔者拟用集合论思想对这道题目的构成、解法和演变,作一番探讨。这道题目是: “一个班有48人。班主任在班会上问:谁做完语文作业?请举手!有37人举手。又问:谁做完数学作业?请举手!有42人举手。最后说:谁语文、数学作 Five-year primary school teaching materials five 41, “Practice 11” of the 12 questions, is to infiltrate the thinking of a collection of thinking questions. In order to help teachers to understand and grasp this topic deeply, I intend to use the theory of set theory to discuss the composition, solution and evolution of this subject. This topic is: "a class has 48. class teacher at the class meeting to ask: who finish the language homework? Please raise your hand! 37 people raise their hands. And ask: who finish math homework? Please raise your hands! There are 42 people Finally, say: who language, mathematics