1049370 omit the mantissa after the thousand

Analysis: Rounding is a method of counting retention with precision that is essentially the same as other methods. However, the peculiarity is that rounding is used so that the difference between the reserved part and the actual value does not exceed one-half of the last order of magnitude

If the probability of 0 9 occurs, the sum of the errors of this retention method is the smallest for a large amount of retained data. That's why we use this method as the basic retention method.

Examples:

Example 1: e.g. Rounded off, retained. However, sometimes you should not use the rounding method, but use the "one method" and the "tail removal method". The rounding in rounding is , and the rounding is .

For example, 288 students go on a spring outing, and 45 people are on a bus, which is a bus, but you must enter one to prevent more people from coming out and not letting fewer cars, because the number of cars cannot be a decimal, so 7 buses are needed. For example, 1016 liters of gasoline, you need to refuel the car, 20 liters of one, you can add an average of one car, but you must go to the tail to not let the car out more, let the oil less, because the number of cars can not be a decimal, so you can only refuel 50 cars.

Note: Order of magnitude: that is, the weight of the position where the number is located, such as this number, the order of magnitude of 3 is 1 (10), and the order of magnitude of 9 is.

Example 2: Practical application in life and work – e.g. the annual market share estimate is achieved, but the estimate is rounded up to 1% for aesthetic purposes when it is presented at the official meeting. Whether it is from the point of view or the appearance of the weight will be much more weighty.

The first 100,000, the second 104, the third 1049

The original number 1049370 omitted 10,000 digits, and the mantissa after it is 1.05 million. The question refers to omitting the mantissa after the thousands, i.e. starting from the thousands. The rules on which its omission is based follow "rounding".

The specific rule of "rounding" is that the highest digit of the mantissa is 4 or smaller than 4, and the mantissa is removed. If the highest digit of the mantissa is 5 or greater than 5, round the mantissa to the position before it"1"。

Rounding the history of China's development:

1. The book "Huainanzi" in the 2nd century BC in China uses 12 integers to represent the length of one or two law tubes.

2. The method of "rounding" is also used in the "Nine Chapters of Arithmetic", when using the proportional method to find the vehicles that should be produced by each county, because the vehicles are integers, they use the rounding method to deal with the calculation results.

3. In 237 A.D., when Yang Wei of the Three Kingdoms Wei State compiled the "Jingchu Calendar", he had made a clear record of this rounding method: "More than half of the law is ranked into one, and less than half of the law is discarded." The method here refers to the denominator, which means that the fraction whose numerator is greater than half of the denominator can be advanced by 1 place, otherwise it will be discarded and not carried.

4. 604 A.D"After the appearance of the "Imperial Calendar", the rounding notation is more accurate: "more than half is the time, the following is the retreat, the retreat is strong before the matching, and the weak after the matching" In the "Imperial Calendar", if the approximate value is advanced or retreated, the word "strong" or "weak" is generally written after this number.

973816 omitting the mantissa after the thousand, it is 970,000. Sentence Yu Song

Omitting the mantissa after the thousand digits is rounded.

When finding the approximate number, and then taking the decimal approximate number, if the highest digit of the mantissa is four or smaller than four, remove the mantissa number, if the highest digit of the mantissa is five or more than five, round off the mantissa number, and advance one in the previous digit of this method of taking the approximate number, called rounding. The approximate number is a number that is not much different from the original data obtained by rounding, advancing or tailing, etc., and the mantissa after the 973816 omitting thousands is 970000.

The mantissa after 709 5000 omitting 10,000 is about 710 0000.

The analysis process is as follows:

According to the need, keep the calculated number to a certain digit, and the remaining part, when the first digit is not greater than 4, it will be rounded off, and when it is not less than 5, it will be rounded to the previous digit by 1. When rounding off the whole number, a few zeros are added to the rounding of several integers.

According to the definition of rounding: 709 5000 omits the mantissa after 10,000, you need to see the thousands, that is, 5, full 5 forward 1, you can get: 709 5000 710 0000.

Extended information: integer digit order table: "Scale: 100 million, 10,000, 10,000,000,000,000,000,000,000,000,000, Digital: 100 billion, 10 billion, billion, billion, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 10

Different counting units.

In a certain order, the position they occupy is called a digit. The digits in an integer are from right to left, gradually getting larger; The first digit is a bit, the second is a ten, the third is a hundred, the fourth is a thousand, and so on. For the same number, due to the different digits and counting units, the values represented are also different.

4879507 omit the mantissa after the thousand: 4880.

Omitting the mantissa after the thousand digits is rounding to find an approximation.

When taking the decimal approximation, if the highest digit of the mantissa is 4 or less than 4, remove the mantissa number. If the highest digit of the mantissa is 5 or greater than 5, round the mantissa to the position before it"1"This method of approximating numbers is called rounding.

An approximate number is a number that is close to an exact number. Among them, the exact number is the original data of the number, and it has not been expressed before any operations such as reduction, simplification, or rounding. The approximate number is a number that is not much different from the original data obtained by rounding, advancing or removing the tailing.

An approximate number is rounded to which digit it is, then the approximate number is said to be exactly to which digit, from the first non-0 digit on the left to the exact digit stop.

The mantissa after the omitted thousand digits is 9,835,000. 9834960 omit the number after the thousand, that is, it is accurate to the thousand, according to the rounding rule, see that the number 9 on the hundred is greater than 5, to carry the digit, the number on the thousand is 4 + 1 = 5, then this number is 9835000.

When taking the decimal approximation, if the highest digit of the mantissa is 4 or less than 4, remove the mantissa number. If the highest digit of the mantissa is 5 or greater than 5, round the mantissa and add 1 to the position before it"。In the multiplication calculation, if the product is not too exact, the rounding method can be used to omit the mantissa number after the highest digit of the two factors, find the approximate number, and then multiply the obtained two trembling approximations.

Related information

Rounding to double is a method of counting retention with precision. here"Four"It means less than five"Six"It means greater than five"Five"It is the mantissa after rounding the position every five, look at the previous one, and the odd entry is not even. If you keep one decimal place, because 2 is an even number, it is.

Another example, because 3 is an odd number, it is.

From a statistical point of view,"Rounded up to five in pairs"than"Four burns are rounded off"To be scientific, it makes the rounded results some larger, some smaller, and more average. Instead of rounding in every five like the rounding of the eggplant segment macro, the result is biased towards large numbers.

999630 omitted the mantissa behind the thousand, the simple bend potato is: 1000 thousand sedan (1000000).

Use rounding.

Hope it helps!

Summary. Hello, I'm glad to answer for you 995909 omitting the mantissa after the thousand is: to omit the mantissa after the thousand digits in the 995909, you first have to see what the number is after the thousand digits (hundreds), because there are still three digits after the thousands, if the last three digits are 0, it is a whole thousand number, and rewrite the thousand unit after going to 0, and it is an accurate number.

One of the three digits is not 0, and the rewriting to the unit of thousands is an approximate number. The last three digits of this number are 909, the hundred digits are greater than 4, and the previous digit (thousand digits 5 ten 1) after removing the mantissa number is 6, so this number is about equal to 996 thousand. Or say 996000.

Hello, I'm glad to answer for you 995909 omitting the mantissa after the thousand is: to omit the mantissa after the thousand digits in the 995909, you first have to see what the number is after the thousand digits (hundreds), because there are still three digits after the thousands, if the last three digits are 0, it is a whole thousand number, and rewrite the thousand unit after going to 0, and it is an accurate number. One of the three digits is not 0, and the rewriting to the unit of thousands is an approximate number.

The last three digits of this number are 909, the hundred digits are greater than 4, and the previous digit (thousand digits 5 ten 1) after removing the mantissa number is 6, so this number is about equal to 996 thousand. Or say 996000.

Directly use rounding to get the approximate value, expressed in thousands omitted The mantissa after the thousand digit is rounded to find the approximate number, if the zui high digit of the mantissa is four or smaller than four.

The rent difference is the mantissa of the provincial song type before the thousand.

Then clear the word for the number field behind the thousand.

Rounding is sufficient.

74509 here

That's *1000

So it's about 75 * 1000

Answer: The mantissa after 74509 omitting the thousand digits is about 75000.