小学数学知识问答300例—精确度
科普小知识2022-07-31 13:35:14
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111.什么是准确性?
当一个精确值用其近似值表示时,允许有一定程度的误差,并且必须根据条件或需要确保必要的精度。这叫做准确性。例如:pi = 3.14159...,缺陷的近似值是3.1,3.14,3.141,...,精确到0.1,0.01,0.001,...,使用尾部移除方法。剩余近似值为0.1,0.01,0.001,...是3.2,3.15,3.142,......这里,0.1,0.01,0.001,......表示近似数字的精度。