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教学内容:北师大版《义务教育教科书?数学》四年级上册第84~85页。教学目标:1.结合情境探索零上、零下温度的表示方法,体验用符号表示温度的必要性,理解这样的数表示温度的实际意义。2.通过在温度计上标记零上温度和零下温度的活动,体会零上温度、零下温度在温度计上的位置顺序,会正确读出温度计上显示的温度。3.会用带“-”的数表示零下温度,并能比较两个零下温度的大小。4.在数学活动中体会成功的快乐,感受数学与现实生活的紧密联系,培养学习
Teaching content: Beijing Normal University version of “compulsory education textbooks? Mathematics” fourth grade on the first 84 ~ 85 pages. Teaching objectives: 1. Combination of situations to explore the zero, the temperature below zero, experience the need to use symbols to indicate the temperature, the understanding of such a number that the actual meaning of temperature. 2. By marking the thermometer on the activities of zero temperature and zero temperature, experience zero temperature, zero temperature in the thermometer on the location of the order, will be correctly read out the temperature displayed on the thermometer. 3. Will be used with “-” number indicates the temperature below zero, and can compare the temperature of two minus the size. 4. Experience the happiness of success in mathematics activities, feel the close connection between mathematics and real life, and cultivate learning