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在心算界因五行加减一般认为难度大、速度慢,所以拒之门外,不被采用。浙江、吉林二省的经验是一目一行加减比较好。根据心理学计算,如果采用一目一行加减,15分钟计算加减法45题时,速度就已经出现了闪光融合。再提高速度保证质量几乎是不可能的了。但我们认为要想提高速度,必须用一目多行方能克服闪光融合造成的心理障碍。因此,我们认为只要采取正确的方法。推行一目五行加减法方是今后提高加减心算技术的关键。下面把我们呼玛县第二小学在训练一目五行加减的一些方法介绍如下: 一目五行的运算方法分为四个阶段:
In the mental arithmetic sector due to the addition and subtraction of the Five Elements generally considered difficult and slow, so the door, not to be adopted. The experience of Zhejiang and Jilin provinces is better than any other. According to psychology calculations, if you use one line to add or subtract, 15 minutes to calculate the addition and subtraction 45 questions, the speed has emerged flash fusion. It is almost impossible to increase the speed and ensure quality. However, in our opinion, in order to speed up, we must overcome the psychological barrier caused by the flash fusion with a single line and multiple lines. Therefore, we think that we should take the right approach. The implementation of adding and subtracting one square by five lines is the key to raising the level of mental arithmetic in the future. The following Huma County Second Primary School in training a head and five lines addition and subtraction of some of the methods are as follows: One head and five lines of operation is divided into four stages: