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The approximate number is 2.4 × 105____ It's a significant number. It's accurate to___ position
The approximate number 2.4 × 10 ^ 5 has two significant digits, which is accurate to 100000 digits
The approximate number is 4.10 × 105______ , yes___ A significant number
5 is the index
Thousand
3 significant numbers
On approximate number and significant number
The significant number of the fourth power of data 3.10 × 10 is ()
The data 20000 contains three significant numbers. The approximate number is ()
Data 0.02076 three significant digits are reserved, about________
Use rounding method to approximate 60340 (keep two significant numbers) 60340 ≈______
The significant number of the fourth power of data 3.10 × 10 is (3,1,0)
The approximate number of data 20000 is (2.00 × 10 to the fourth power)
Data 0.02076 three significant digits are reserved, about___ 0.0208_____
Use rounding method to approximate 60340 (keep two significant numbers) 60340 ≈__ The fourth power of 6.0 × 10____
A question about approximate number and significant number
How accurate is the approximate number of 23000? How many significant numbers are there?
The significant number starts from the first non-zero number. The decimal point is not counted and the sign digit is not counted. So the significant number is two
23000, which is accurate? The unit of the last number 3 is 3000, so it is accurate to 1000
Kneel for approximate number and significant number!
10. Name the approximate numbers in the following questions, to which point are they accurate? How many significant numbers are there?
(1) China's population is about 1.3 billion;
(2) the approximate value of π is 3.14;
(3) the output value of a factory in 2004 is about 20 million yuan
(1) China's population is about 1.3 billion, with two effective figures of 100 million
(2) the approximate value of π is 3.14; the three significant digits are 0.01
(3) the output value of a factory in 2004 is about 20 million yuan. There are four significant figures
All positive integers n that make 3 ^ n + 729 a perfect square are
N = 7, just this one
a. B is a positive integer no more than 20. If B of a is equal to 1 of 18, find the numbers represented by a and B
B / (the square of a) = 1 / 18 = 2 / 36 = 8 / (36 * 4) = 18 / (36 * 9) at most (the numerator is an integer and the denominator is a complete square)
So B = 2, a = 6
b=8 a=12
b=18 a=18
a. B is a natural number no more than 20. If B of a is equal to 1 of 12, find the number represented by a and B
a. B is a natural number no more than 20. If B of a is equal to 1 of 12, find the number represented by a and B
a=6,b=3
a=12,b=12
What is the square of 20-19 + 18 - ·· 1?
20^2-19^2+18^2-17^2+.1 =(20+19)（20-19）+（18+17）（18-17）+.+（2+1）（2-1） =39+35+31+27+23+19+15+11+7+3 =210
The sum of 75 consecutive positive integers starting from a certain number is a complete square number, and the minimum value of the number ()
Explain the thinking process
Let this number be n, and the sum of these 75 numbers be (n + N + 74) * 75 / 2 = (n + 37) * 75 (n + 37) * 75 = (n + 37) * 3 * 2525. If (n + 37) * 3 is also a complete square, then n + 37 must be the product of a multiple of 3 and a complete square. When n = 2, N + 37 = 39 = 3 * 13, but 13 is not a complete square
RELATED INFORMATIONS
- 1. Arrange the positive and even numbers into 5 columns as follows: column 1, column 2, column 3, column 4, column 5, row 1, row 2, row 2, row 16, 14, 12, 10, row 3, row 2, 30, 28, 26 According to the above arrangement, 2012 should be ranked in () A. Line 502, column 1 B. line 250, column 5 C. line 251, column 4 d. line 252, column 3
- 2. Approximate and significant numbers of rational numbers, The charge of a taxi is 10 yuan when the distance s is less than or equal to 4 km. When the distance s is less than or equal to 15 km, 1.6 yuan will be charged for every 1000 meters and 2.4 yuan for every kilometer. If the distance is less than 1 km, it will be calculated as 1 km. If someone takes this kind of taxi for 14.5 km, it will be RMB yuan. If someone takes this kind of taxi, he will pay 75.6 yuan, The maximum distance is? Km I have to hand in my homework at five
- 3. How many digits are the approximate number of 1.3 billion? How many significant digits are there? How many digits are there? How many significant digits are there?
- 4. Scientific counting approximate significant number What's the exact decile of 0.00000007? How many significant numbers are there
- 5. 2003.20 is an approximate number, which is accurate to () digits and has () significant digits 2.029 * 10 ^ 6, accurate to 10000 bits (), significant number () To train of thought, the day a good score
- 6. Approximate number 2010, 2 significant numbers are reserved__ ?
- 7. How accurate is the approximate number 3300? Better be sure!
- 8. Significant number and approximate number If (a + 1) square + | b-2005 | = 0, then the b-th order of 2006-a=
- 9. Significant number of approximate number If the repeated number is a significant number, such as 0.01223, is the significant number three 123s or four 1223, or 0.00125004, is the significant number five 12504, or six 125004, or 0.102405, is the significant number five 10245, or six 102405, please answer
- 10. Is it true that "approximate number 220 and approximate number 0.101 both have three significant numbers"?
- 11. Sandstorm is a bad weather phenomenon caused by land desertification, which causes great harm to human survival. When sandstorm occurs, the visibility is only tens of meters or even several meters, and the sky turns yellow and dark A. Only the light with shorter wavelength can reach the ground. B. only the light with longer wavelength can reach the ground. C. only the light with higher frequency can reach the ground. D. only the light with lower frequency can reach the ground
- 12. There are some questions about math, science, notation and other things (1) 0.0003 μ M=____ M (2) approximation 0.0070 to___ Bit, there are two significant numbers, they are____ (3) Before May Day, an electrical appliance store opened in a certain area. If 200 of the 1000 prize papers they issued can win, what is the probability that one of them can win____
- 13. What is the third power of the monomial 4xy?
- 14. A small wooden box without cover, measuring from the outside, is 10 cm long, 8 cm wide, 5 cm high, and 1 cm thick. How many square centimeters of 1 cm thick wood board is needed to make this wooden box?
- 15. What is the length and width of the 2.8-inch screen?
- 16. The screen size of a TV set is 24 inches × 16 inches. After the improvement, the length and width of the screen of the TV set will be increased by 20%, and the area will be increased by several percent
- 17. How to convert feet into centimeters
- 18. Print out all the Narcissus numbers. The narcissus number is a three digit number whose cube sum is equal to the number itself Example: 153 = 1 cube + 5 cube + 3 cube
- 19. Use java to find all the "Narcissus numbers" within 1000. The so-called "narcissus number" refers to a three digit number whose cubic sum of each digit is equal to the number itself
- 20. VB programming, if a three digit integer is equal to the cube sum of its digits, then the number is called narcissus number. Enter an integer to judge whether it is narcissus number Private Sub Form_ Load() Dim x%,a%,b%,c%,y% X = InputBox ("please input three digits", "prompt box") If Len(x) = 3 Then a = Val(Mid(x,1,1)) b = Val(Mid(x,2,1)) c = Val(Mid(x,3,1)) y = Val(x) If a ^ 3 + b ^ 3 + c ^ 3 = y Then Print "is Narcissus water" Else Print "not narcissus number" End If Else Print "input error" End If End Sub What's wrong with the above?