Is the omission rounded or rounded, and the omitted decimal rounded?

Omit the mantissa after 10,000" is to find the approximate number of this number, and use the method of "rounding", so that the number obtained will not be too different from the original number. If it is "remove the mantissa number", the number obtained in this way may be too different from the original number, for example: 785412 remove the mantissa is 780,000, which is 5412 different from the original number; The "rounding" method is 790,000, which is 4588 different from the original number.

Omit the mantissa after 10,000" is to make the approximate number as close to the original number as possible, so use the "rounding" method.

This question is "rounding", and the answer is 790,000 yuan.

This is generally done by "rounding".

There are also special times:

1. Advance 1 method.

For example: An oil drum can hold 16 kilograms of oil, and Uncle Wang wants to buy 70 kilograms of oil, so he needs to bring at least a few barrels?

70 16) 5 (pcs).

Because it is impossible to bring one barrel, but the oil is still loaded, you can only bring one more, so you should enter 1.

2. Tail removal method.

For example, if a piece of cloth is 20 meters in total, and each set of clothes needs to be clothed for 3 meters, how many sets of cloth can be made at most?

11 3 3 (sets) ......2 (m) 3 (sets).

Because when making clothes, there are 2 meters left, which is not enough to make a set, so I can only give it up.

Therefore, this question should be rounded off.

It should be rounded up to 790,000.

According to the topic you cited, it is rounded, that is, 790,000,!

The mantissa after 10,000 is omitted and rounded.

The example you gave is rounded

Know how to round up to five in pairs.

The specific rules for rounding up are as follows:

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The rules of rounding up are as follows: "Rounding up to five pairs", that is, "rounding off 6 to 5", where "four" refers to rounding off at 4 o'clock"Six"It refers to the 6 o'clock entry. "Five"It refers to the number after 5, when there is a number after 5, round 5 to 1; When there is no significant figure after 5, it needs to be divided into two situations:

5 is an odd number, rounded to 1; 5 is an even number, rounding 5 is not (0 is an even number). 1. Specific calculation rules: (1) When the number to be revised is less than 5, the number will be rounded; (2) When the number to be revised is greater than 5, it will be rounded; (3) When the number to be amended is equal to 5, the number before 5 should be looked at, if it is an odd number, it will be rounded, and if it is an even number, 5 will be rounded, that is, the last number after the amendment will become an even number; If there is any number after 5 that is not "0", then it should be carried regardless of whether the 5 is preceded by an odd or even number.

2. Origin: Another common of this way. Full text.

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The specific rules for rounding up are as follows:

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The specific rules for rounding up are as follows:

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It is required that the number after the number of rounded digits greater than 4 is increased by one, and the number less than 4 is directly rounded.

149 requires 100 to be omitted after the hundred

Rounding, which is an approximation of the number that needs to be retained if a certain digit (as required.

The number on the digit after the digit is 4 or smaller than 4, just round this digit and the number after it; If the number in this digit is 5 or greater than 5, round off the digit and the following digit and add 1 to the previous digit.

149 omits the number after the hundred, and uses rounding to find the approximate value, the number on the last digit of the hundred digit (ten) is 4, and the number after 4 and the following 9 are rounded, and the result is that 149 is approximately equal to 100

Rounding is a method of counting retention with precision that is essentially the same as other methods. However, the peculiarity is that the difference between the retained 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 minimal for a large number of retained data.

That's why we use this method as the basic retention method.

That is, if the first digit of the part to be rounded is less than five, it is rounded; If it is greater than or equal to five, the last digit of the reserved part is added to 1.

For example, 149 hundred is omitted after it, and ten is 4, so the rounding is 100

Rounding is the rounding of 5 into one, and the rounding of 5.

The omission after 149 hundred is the omission after 1, because it is 4 on the ten place, so it is rounded off, it is 100.

If it is 151 hundred, it is omitted, because the hundred is 1, and the ten is 5, and it is 2 hundred.

The method of rounding to find the approximate number, to find the approximate number of a number, to see whether the highest digit of its mantissa is full of 5, if it is less than 5, directly round off the mantissa number, if it is full of 5, after rounding off the mantissa number, it is necessary to omit it after entering the hundred digit to its previous digit: 149 100

For example, keep two decimal places, go to one place greater than 5, leave it unremembered if it is less than 5, and omit = if it is omitted.

Rounding less than 5, and omitting more than or equal to 5 into 149 hundred, that is, looking at the number 4 on the tenth, rounding, is 100

Rounding less than 5, greater than or equal to 5! 100

If you keep the hundreds, after rounding, 149 is written as 100. If ten digits are reserved, it is written 150.

Rounding usage: If you keep the hundreds, look at the numbers after the hundreds, if it is 4 (including numbers less than 4), it will be rounded off (including other numbers after 4), if it is 5 (including numbers greater than 5), it will be rounded to 1, and then all the numbers after 5 and 5 will be rounded.

For example, if you round 149, if you don't have five or more, it becomes 140, and if you can do it, it will be 150!

Omit the mantissa after 10,000" is to find the approximate number of this number, and use the method of "rounding", so that the number obtained will not be too different from the original number. If it is "remove the mantissa number", the number obtained in this way may be too different from the original number, for example: 785412 remove the mantissa is 780,000, which is 5412 different from the original number; The "rounding" method is 790,000, which is 4588 different from the original number.

Omit the mantissa after 10,000" is to make the approximate number as close to the original number as possible, so use the "rounding" method.

Omitting decimals is not rounding, e.g. decimals, omitting decimal places is 3, and rounding to single digits is 4.

And there is an essential difference: omitting the decimal means that the decimal does not need to be followed, and the range of application is only to the single place, while rounding can limit the range, such as decimals, rounding to the single place is 3, rounding to the tenth place.

Rounded to the hundredth percentile is, rounded to the thousandth percentile is.

I don't understand it too clearly, is there a difference between decimals omitted from part and rounded? If it is du, it can be interpreted like this:

Omitting the decimal part is to take the dao integer, such as 3, 3, 3;

If other digits are omitted, such as the thousandth digit and later digits, this is generally not the case.

And rounding is greater than or equal to 5 into 1, less than 5 rounded, which does not only refer to which digit, such as: accurate to the single digit to get 3, accurate to the tenth digit, accurate to the thousandth.

It cannot be divisible by rounding, that is, when the result of the division operation is not the number of integers and keys, it is reserved to call the virtual coincidence. Such as].