【课例背景】本课是学生继“认识11—20各数,初步认识个位和十位,感知以‘十’为单位的计算方法。”、“20以内数的非进位加法和不退位减法”之后,首次尝试探索“进位加法”。教材围绕解决“一共有几瓶牛奶?”这一问题,从“摆一摆(小棒),说一说”、“做一做(拨计数器),说一说”、“圈一圈(小猫,苹果)。算一算”这三个方面直观、形象地呈现学习内容,引导学生从不同角度探索出计算的方法和“凑十”的策略。学生在既往学习中积累了运用“圈十”、摆小棒、拨计数器等方法计数 【Lesson Background】 This course is a calculation method for students following the principle of “Understanding 11-20, initial understanding of the first place and the tenth place, and perceiving the unit of ten as the unit.”, “ And does not abate subtraction ”After the first attempt to explore “ carry addition ”. Textbook around the solution “a total of a few bottles of milk?” This issue from the “pendulum (small stick), say ”, “do a do (dial counter), say ”Circle“ (kitten, apple) .To calculate the three aspects of visual, visual presentation of learning content, and guide students to explore from different angles of the calculation method and ”Minato ten “ strategy. Students in the past study has accumulated the use of ”circle ten ", put a small stick, dial counter and other methods count