估算意识和能力的培养是学生数学能力的重要方面,目前,加强估算教学和提高学生的估算能力是国际数学教育改革重要方向之一。估算教学势必要落实到课堂中,并渗透到学业评价里。与此同时,出现的问题也引发了我们的思考。问题之一:估算≠瞎猜现象:对于刚接触估算的孩子,一听说“估一估”“猜一猜”如北师大版第三册“有多少个字”“有多少枚棋子”等等,学生往往不假思索地瞎说;在长度和质量单位教学时对物体长度和 The cultivation of estimation awareness and ability is an important aspect of students ’mathematical abilities. At present, strengthening estimation teaching and improving students’ estimation ability are one of the most important directions in international mathematics education reform. Estimation teaching is bound to be implemented into the classroom and into the academic evaluation. At the same time, the problems that have arisen have also triggered our thinking. One of the questions: Estimation ≠ Guess the phenomenon: For the first contact with the estimated children, I heard “Estimated ” “Guess ” such as the Beijing Normal University version of the third book “How many chess pieces ” and so on, students often nonsense nonsense; length and quality of the unit teaching on the object length and