There is an 8-digit number, and rounding it to tens of millions is 50 million. What is the maximum and minimum of this number

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• 1. 1. Rounding a five digit number to ten thousand is about seventy thousand. What's the maximum and minimum of this number? 2. What's the number of nine digits that can be read out of all zeros with the nine digits of three thousand?
• 2. Divided by 7 or 6, the remainder is 1. What are the maximum and minimum four digits that meet this condition? Urgent! The teacher wants to use it! Please~
• 3. Divided by 7 or 6, the remainder is 1. What are the maximum four digits and the minimum four digits?
• 4. How many 4-digit numbers are there when the remainder is 4 divided by 6.7.8.9
• 5. What is the maximum number of one digit divided by one digit? ① 9, ② 8, ③ 7
• 6. A four digit number, one digit number is 5, every three adjacent numbers add up to 10, what is the number
• 7. If 1 / a plus 1 / b equals 1 / 3, 1 / a plus 1 / B plus 1 / C equals 5 / 7, then what is C equal to?
• 8. If three points a (a, 2), B (5, 1), C (- 4, 2a) are on the same line, then the value of a is () A. 1 or 2B. 2 or 72C. 2 or − 72d. 1 or - 2
• 9. Let f (x) = x ^ 4-2x ^ 3 + 3x ^ 2-2x + 1 1. Find the remainder r of F (x) divided by the following formulas: (1) x + 1, (2) X-1, (3) x + 2, (4) X-2, (5) 2 (2) Respectively calculate: F (- 1), f (1), f (- 2), f (2), f (- 1 / 2)
• 10. A simple operation for finding 25-15
• 11. A five digit number is about 100000 after rounding. What is the maximum and minimum of this number
• 12. There is a 7-digit number, and the number rounded to 10000 is 6.82 million. What is the minimum and the maximum of the 7-digit number? Is there any calculation method?
• 13. An eight digit number is composed of eight digits: 0, 1, 2, 3, 4, 5, 6 and 7. After rounding to ten million digits, it is about 70 million. What is the maximum and minimum of the eight digit number?
• 14. If a six digit number is rounded to 10000, it will be about 400000. The largest number is 10000______ The smallest is______ ．
• 15. If a six digit number is rounded to an approximate value of 150000, then the maximum of the five digits is {and the minimum is {
• 16. There are two five digit numbers, one is more than 80000, and the other is less than 80000. Rounding to 10000, they are all about 80000, and the difference is 5. How many pairs of such five digit numbers are there I'm in a hurry
• 17. There is a six digit number. Rounding it to the "ten thousand" digit is 500000. The maximum number is______ The smallest is______ ．
• 18. The approximate number of a five digit number rounded to 10000 is 40000. What is the maximum and minimum of this number
• 19. There is a ten digit number. Rounding it to 100 million is 4.8 billion. The maximum number is (), and the minimum number is ()
• 20. Given A-B = 5, ab = 4, then a ^ 3b-2a ^ 2B ^ 2 = AB ^ 3 equals