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在使用双面水准尺进行水准测量时,常常因不能迅速得出双面标尺读数的校验结果而影响进度。下面给您介绍一种快速心算口诀。鉴于标尺的四位读数前两位不易错,针对常数为4687和4787的标尺,有以下口诀: 黑尺读数为依据,个位去3十去1。数据不足前借位,个十为0变87。前两句的意思是:以黑面尺的读数为依据,将个位数上去掉3,十位数上去掉1,得出的结果在理论
When using a two-sided ruler for level measurement, it is often the case that the progress can not be achieved because the calibration result of the two-sided ruler reading can not be quickly obtained. Here to introduce you to a quick mental arithmetic formula. In view of the first four digits of the scale reading is not easy to error, for the constant 4687 and 4787 of the ruler, the following formula: black-foot reading as the basis, a place to go to ten to ten. To borrow before the data is insufficient, a ten is 0 change 87. The meaning of the first two sentences is: Based on the reading of the black noodles, the number of digits is removed 3, the number of digits is removed 1, the result is in theory