估算,指的是对计算的结果做出大致判断,把握数的大致范围。随着计算机技术的飞速发展,大数目的繁杂计算和部分稍复杂的精确计算都可以借助计算机(或计算器)完成。相应地,对计算结果的大致判断将变得更为经常和实用,估算的教学价值也将得到凸显。 Estimation, refers to the calculation of the results to make a rough judgment, grasp the approximate range of numbers. With the rapid development of computer technology, a large number of complex calculations and some of the more complex and accurate calculations can be done by computer (or calculator). Accordingly, the general judgment of the calculation result will become more frequent and practical, and the estimated teaching value will also be highlighted.