课标中明确说:小学数学的教学内容分为四大领域,即数与代数、空间与图形、统计与概率、综合实践与应用。这是根据不同的教学内容而分的,但在这四个领域中,“等于”的关系贯穿其中。“等于”是在小学阶段学生接触最多,也最为重要的表示相等关系的式子。学生在学前教育阶段就大量地接触关于“等于”的想象,经过小学六年的数学学习,学生对“等于”的感知也较深刻,为了更加清楚地理清学生对“等于”这一知识 Curriculum standard clearly said: primary school mathematics teaching is divided into four areas, namely, numbers and algebra, space and graphics, statistics and probability, integrated practice and application. This is based on different teaching content and divided, but in these four areas, “equal to” the relationship runs through them. “Equal to ” is the formula that students in primary school have the most contact with and most importantly represent equal relationships. After the elementary school six years of mathematics learning, students have a deeper understanding of “equal to ”, in order to more clearly identify the students “equal to ”This knowledge