在线看一区二区,国产精品 久久久久久久,夜夜久久av,重口味一区二区

當(dāng)前位置: > 學(xué)術(shù)報告 > 文科 > 正文

文科

Investigation On A Certain Misconception On Fraction

發(fā)布時間:2015-06-30 瀏覽:

講座題目:Investigation On A Certain Misconception On Fraction

講座人:劉陽

主持人:羅新兵

講座時間:15:00

講座日期:2015-6-30

地點(diǎn):長安校區(qū) 數(shù)學(xué)與信息科學(xué)學(xué)院學(xué)術(shù)報告廳

主辦單位:數(shù)學(xué)與信息科學(xué)學(xué)院

講座內(nèi)容:The origin of the research project reported in this paper is the well-known misconception 1/2+1/5=2/7 which is one of the objects studied here. The method used is an empirical study in terms of a questionnaire on 60 fresh university students at a Swedish university on the one side and the current Swedish curriculum on the other side, and the study is also supplemented by a theoretical discussion. The theoretical discussion is conducted within the theoretical framework of conceptual and procedural knowledge as well as that of diagnostic teaching.The focus of this research project is on causes of the misconception from global perspective in which case we treat the knowledge on fraction as a whole and examine it on both empirical level and on curricular level. In inquiring for the causes of the misconception we compare the addition of two fractions with the addition of numbers with two different but commensurable units, say 3 cm + 7dm = 7.3dm. These two additions are similar from mathematical aspect, for what is involved is a change of unit; in the case of fraction, the change amounts to prolonging or shortening a fraction. The comparison indicates that weak sense of unit together with lack of proficiency in prolonging or shortening a fraction could be one of causes for the misconception. Our empirical study seems to confirm this contention which can have some impact on teaching designing, curriculum designing and textbook writing.

99久久99综合| 麻豆传媒在线播| 免费美女AV网| 久久中字无码| 久久精品视频免费在线观看| 超碰国产成人精品导航| 亚洲不卡二区三区中文字幕| 欧美顶级黄片一区二区三区| 视频色逼乱| 国产精品国产三级国产专播I7| 亚洲欧洲日本在线观看| 色女人久久久久久久久久| 一区二区三区青青草| av不卡高清| 免费黄色大秀视频网站| 久久久精品午夜福利电影| 正在播放:内射美熟人妻少妇| 亚洲福利av综合人妻| 成人免费黄毛片| 亚洲人性生活视频网址| 久久久影院官网| 歐美一共區日本二區| 欧美日韩91p| 天天干人人曰在线| 自拍视频免费网站观看| 国产精品欧美色| 在线毛片免费播放AV| 麻豆成人在线播放一区二区| 老年人黄色影院| 国产丝袜脚足交网站| 一区二区青草视频| 大香蕉只有视频在线| 国产69精品久久久久久在线播放 | 伊人成人网站| 成年人美女国产黄色香蕉视频| 欧美日韩一线在线不卡| 内射后入一区二区三区四区| 深爱五月激动丁香五月在线| 少妇高潮 30p| 嗯啊不要淫视频| 日本一区舔阴视频在线99 |