21 55 75 148 10 05What should be the result of the amendment with three significant figures?

Keeping 3 significant digits is to keep the number 3 digits from left to right, and the fourth digit is rounded off. Such as:

Keeping 3 significant digits is.

Keeping three significant figures is 146.

Keeping three significant figures is.

So the result is .1

Significant figures. From the first non-zero digit to the left of a number to the last digit, all digits are significant digits for that number.

It is a number from the first non-0 number on the left to the last digit, all digits (including 0, the nth power of 10 is not counted in scientific notation), called significant digits. To put it simply, remove all the 0s in front of a number, and everything from the first positive integer to the exact digit is a significant digit.

For example, the first two zeros are not significant figures, and the following 109 are significant figures (note that the middle 0 is also counted).

Multiplied by 10 to the 5th power), 3 1 0 9 are significant figures, and the following 10 to the 5th power is not a significant figure.

Only 5 and 2 are significant figures.

The first two zeros are not significant figures, and the following 230 are significant figures (the following 0s are also counted).

There are 3 significant figures.

There are 7 significant digits.

multiplied by 10 to the power of 4), 3 significant figures are reserved.

The logarithmic significant digits are all digits after the decimal point, e.g. log x = significant figures are, log a = significant figures are .,5, ph = significant figures are.

.05 The result of the revision of the three-digit significant number of the three significant figures of the Bao Zen crack should be.

a
.1. Source width.

b
.0c
.1

d
.0e
.1

Correct He Zhi answer0

Modification rules, multiplication and division operations, with the smallest number of significant digits as the standard, the number of digits in the operation formula is retained, and one more can be reserved, and then enter the line to calculate the imitation of chaotic potatoes, and finally revise the calculation results.

According to the rules of the Song Fight Revision of Significant Figures, the contract is revised to the third decimal place, and the result is ().

Correct answer to the case:

Summary. Reduced to 1 significant digit is the so-called significant figure that is the number that can actually be measured. Its last digit is an inaccurate number, and the rest of the digits are exact numbers.

Reduced to 1 significant digit.

Reduced to 1 significant digit is, the so-called significant digit, is the actual size of the ruler circle can be measured by the collapse of the yard. The last digit of it is an inaccurate number, and the rest of the digits are quasi-de-accurate numbers.

There are still problems. Question 3.

Okay, you wait a minute, I'll do the math.

The mean is that the mean deviation is , the relative mean deviation is , and the relative standard deviation is .

Summary. Hello, I am Mr. Fang Tengfei! I've seen your question and it's going to take 3 minutes to sort out the answer now, please wait a moment Thanks

Hello, I'm Mr. Fang Tengfei Qin Qiaofu! I have seen your question, and now I am sorting out the answer, it will take 3 minutes, please forgive me for a while Thank you

Hello, the answer is. If you want to keep 4 significant digits, it means that the whole number is one, then the decimal place with the sail point is kept three digits, and the 10,000th place is 8, which needs to be advanced by one, so if you keep 4 significant digits, it is. The main test of the question is the knowledge of significant numbers.

According to the rules of the Void Reduction of Significant Figures, the Void Reduction is reduced to the third decimal place:

Correct answer: B

Answer]: greater than 6, belongs to six).

After five, there is no data to close the front, and before five is an odd number, then the advanced state is a double number) less than 4, which belongs to the four rounds).

After five there are a few dusty evidence, forward one).

There is no data after five, and the number before five is even, so it is discarded into an even number) four rounding).