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学生学习数学不仅学习数学事实,更要了解数和运算的实际意义,用数学的观点来解释现实问题。让学生建立数感是小学数学教育的重要任务,估算教学是解决问题中发展学生数感的重要途径之一。
Students not only learn mathematics to learn mathematical facts, but also to understand the practical significance of numbers and operations, mathematical point of view to explain the real problems. It is an important task for elementary school mathematics education to let students establish the number sense. Estimation teaching is one of the important ways to solve the problem of developing the number sense of students.