The binary method is to add 1 to the last number of the reserved part after removing the redundant number, so that the approximate value obtained is the residual approximate value (that is, greater than the accurate value). When rounding up a digit, round up to which digit, no matter what the number on the digit after this digit is, as long as all the digits behind it are not all zeros, all the digits are rounded up to this digit, and then all the digits after this digit are rewritten as zeros.
In our real life, rounding is not always possible, and sometimes rounding is used (that is, as long as the omitted digits are greater than zero, one digit must be entered). For example, a sack can hold 200 Jin of wheat, and there are currently 880 Jin of wheat. How many sacks do you need to wrap it? When 880 is divided by 200, the quotient is 4 and the remainder is 80.
nominal definition
In other words, it is impossible to pack in four sacks, but it needs to be packed in five sacks at one step. The so-called truncation method is a common mathematical method that removes the decimal part of a number, takes its integer part and takes its approximate value (less than the exact value). This method is often used in life, also called truncation principle.
Both one-step method and one-step method use rounding to select and retain results. One-step method and one-step method have certain selection basis, such as loading things, taking a car, taking a boat and so on. They all use one-step method, and everything is done in one step. According to these simple techniques, you can skillfully choose when to use the one-step method and when to use the tail-removing method.