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新课程七年级(下)华师大版数学教科书第22页的16题: 初一(5)班有46名学生,安排值日生时要考虑:周一至周五每天除打扫教室外,还要打扫学校包干区;包干区面积不大,平时人数可少些,周五大扫除要和打扫教室人数差不多;周一早晨需安排1至2名同学整理教室;每位同学每周轮到一次值日.请你代理劳动委员,安排值日人数. 现把“差不多”改换成“一样多”则可求得惟一解: 设扫教室x人,包干区y人,增加a人,整理教室b人(b-1或2).由题意得:
The 16th grade of the new grade 7 (below) Huashi Normal University version of mathematics textbooks: There are 46 students in grade one (5), and the daily value of the arrangement should be considered: Monday and Friday except for cleaning the outside of the classroom. Clean the school baggage area; the area of the baggage area is not large, and the number of people in the area is usually less. The number of cleanups on Fridays is about the same as the number of classrooms cleaned; on Monday morning, 1 to 2 classmates are required to arrange classes; each classmate turns once a week. Please act on behalf of the Labour Commissioner and arrange for the number of people on duty. Now change from “almost” to “just as much” as you can find the only solution: Set up a classroom x person, pack up y people, increase a person, sort out classroom b ( B-1 or 2).