Adding a percent sign to a number reduces it by 9.9%, which turns out to be ()
9.9%÷(100-1)=0.1%
0.1%x100=0.1
If you add a percentage sign to a number, it will be reduced by 9.9%, which was (0.1)
Add a percentage sign to a number, and the number will be reduced by 7.92. What is the original number? The process must be complete
This number is x, X% = x-7.92, x = 8
1.2.3.4. How many non repeating four digit numbers can four numbers constitute
Full Permutation
4*3*2*1=24
RELATED INFORMATIONS
- 1. The four numbers 1, 2, 3 and 4 can be used to form many four digit numbers without repetition. What is the sum of all these four digit numbers? Write the formula (preferably comprehensive), the answer, fast! Kneel down for the answer!
- 2. Use numbers 0, 1, 2, 3 and 4 to form numbers without repeating numbers. (1) how many five digit numbers can be formed? (2) how many odd five digit numbers can be formed? (3) how many positive integers can be formed?
- 3. Use the numbers 0,1,2,3,4,5 to form a number without repetition 1: How many 6 digits can be made up 2: How many natural numbers larger than 300000 can be formed 3: How many four digits can be made up that are multiples of 25 We need to calculate the process
- 4. 3 and 4 / 5-2.7 = 1 / 5 of the number a is equal to 1 / 6 of the number already counted, the number a is 90, and the number already counted is () One ninth of an eight kilogram is as heavy as one eighth of a nine kilogram () right or wrong
- 5. 12 of a number is 90 more than 13. This number is______ .
- 6. Given that the opposite number of a is 1 and 3 / 2, and the opposite number of B is - 2 and 2 / 1, find the value of the algebraic formula a-2b / A + 3B
- 7. How does excel calculate cumulative frequency and cumulative frequency? &Who knows how to use Excel to calculate [cumulative frequency] and [cumulative frequency]
- 8. How do these two values come out of this set of figures 1 15 4 27 91 17 =96\87
- 9. The minimum value of a group of data is 150 and the maximum value is 172. If the group distance is 4, how many groups can be divided when drawing the frequency distribution histogram?
- 10. A set of numerical laws are calculated as follows: 5,6,1,11,7,5,9, What's after 9, please?
- 11. A number will be increased by 19.8 after the percentage sign is removed?
- 12. If you add a percentage sign to a number, the number will be reduced by 29.7______ .
- 13. Number multiplication learning is equal to the number of number words: number () word () learning ()
- 14. Math math math math math math math math math math math math math math math math math math math math math math math math math math math math math math math math math math math math math math math math math math math math math math math math math math math math math math math math math math math math math math What is the concentration of salt water after mixing 500 g of 70% salt water and 300 g of 50% salt water? 30 kg of 25% salt water should be diluted into 6% salt water, It is known that if the salt water is kilogram, the concentration of salt water becomes 3% after adding a certain amount of water for the first time, and 2% after adding the same amount of water for the second time? The concentration of a and B alcohol is 70% and 55% respectively. Now, to prepare 3000 grams of 65% alcohol, how many grams should be taken from each of the two kinds of alcohol? A. We know that a is one-half of the sum of the other three numbers, B is one-third of the sum of the other three numbers, and C is one-quarter of the sum of the other three numbers?
- 15. What is the sum of 5 / 3 and 19 / 21? How much less is 5 / 8 of 2.12 than 2 / 3 of 21? There are seven fourths behind the and
- 16. Five times of a number is 80. This number is two times more than seven times of another number?
- 17. Formula calculation: [1] the product of 0.12 and 80 divided by a number, the quotient is 0.5, find this number. [2] five times of a number minus 7 / 9, get 2 / 9, find this number One half, one sixth, one twenty-four, () () () [2] three fourths less than () less than () less than () four fifths [3] one percent plus two percent plus three percent plus... Plus ninety-nine percent equals ()
- 18. 6 / 5 of a certain number is more than 3 / 4 and 1 / 3. What is the number
- 19. Three classes of grade 6 donated money for "Hope Project". The donation amount of class 1 was 2 / 5 of the donation amount of the other two classes, and the donation amount of class 2 was 2 / 5 of the donation amount of the other two classes 3 / 7. It is known that class 3 donated 145 yuan. How much did the three classes donate?
- 20. The average score of Xiaohua's previous math tests was 80 points, and this time he got 100 points, which just raised the average score of these tests to 85 points?