估算,顾名思义,估摸着计算,是以正确的算理和对所研究的问题的本质已深刻理解为基础,通过大体估值、合情猜想或特值探路等手段,进行粗略、近似的计算而获得正确答案的过程.在数学解题中渗透估算意识,有效地避开了以往“小题大作、费时费力”的逻辑推理过程,达到了简捷、快速、合理、准确的解题目的,恰到好处地契合了近年高考命题倡导的 Estimation, as its name implies, reckons with the calculation that based on a correct calculation and a deep understanding of the nature of the problem under study, a rough approximation is made by means of general valuation, speculation or speculation, etc. And get the correct answer in the process of solving problems in mathematics to penetrate the estimation of consciousness, effectively avoiding the past “little work, time-consuming and laborious ” logical reasoning process to achieve a simple, rapid, reasonable and accurate solution to the problem , Just right to fit the proposition of college entrance examination in recent years