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培养学生的计算能力是小学数学教学的重要任务之一。20以内加减法既是小学数学教材第一册的重点,又是多位数计算的基础,因此,必须从一年级起加强对计算能力的培养。
Training students’ computing ability is one of the important tasks in elementary mathematics teaching. The addition and subtraction within 20 is not only the focus of the first volume of primary school mathematics textbooks, but also the basis of multi-digit calculation. Therefore, it is necessary to strengthen the training of computing abilities from the first grade.