论文部分内容阅读
最近一段时间,由于学校经常断电,而且到很晚才来电,有些班级的电灯、电脑、电视机等设备常常忘了关,一些班级大白天还开着日光灯,一段时间内学校的电费数额惊人。针对这个情况,我们组织学生一起动手算一算,想一想,运用数学知识展现一些现象,通过活动使学生体验到节俭的重要性。师:每班平均有10盏日光灯,每盏日光灯40W,30个教学班1小时用电多少?生:40×10×30=12000W/H,即每小时用电12度。师:如果日光灯每天多用3小时,每月以24天
In recent days, some schools have often forgotten about lights, computers and television sets due to the frequent blackouts in schools and the late arrival of calls. Some classes also have fluorescent lights on during the day and the school electricity bills have been staggering for some time . In response to this situation, we organize students to work together, think about it, using mathematical knowledge to show some phenomena through which students can experience the importance of thrift. Teacher: Each class has an average of 10 fluorescent lamps, each fluorescent lamp 40W, 30 teaching classes 1 hour how much electricity? Students: 40 × 10 × 30 = 12000W / H, that is, 12 degrees per hour electricity. Teacher: If fluorescent lamps use more than 3 hours a day, 24 days a month