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π,圆周率,是小学数学六年级教学的一个重点。小学生从六年级开始学习圆的知识,一直到圆柱与圆锥,都离不开π。那么,什么是π呢?圆周率,一般以希腊字母π来表示,是一个在数学及物理学普遍存在的数学常数。π读pài,是一个常数(约等于3.14),是代表圆周长和直径的比值。它是一个无限不循环小数。在日常生活中,通常都用3.14来代表圆周率去进行近似计算。在六年级的实际教学中,学生对于3.14的记忆胜过了π,对
π, pi, is a primary school mathematics sixth grade teaching a key. Pupils from the sixth grade began to learn the circle of knowledge, until the cylinder and cone, are inseparable from π. So, what is π? The pi, usually expressed in the Greek alphabet π, is a math constant ubiquitous in mathematics and physics. π read pài, is a constant (about equal to 3.14), is the ratio of the circumference and diameter. It is an endless looping decimal. In everyday life, the approximate calculation is made by using 3.14 to represent the PI. In the actual teaching of the sixth grade, students had a memory of 3.14 over π, yes