How to use three sixes and four zeros to read out three zeros?

Very many, such as: 066.0006; 606.0060, the key is to add decimal point

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1. Use 2,5,9,4, choose 3 numbers to form the multiple of 3 and 9 respectively All of them! For example: multiple of 3: Multiple of 9:
2. Two digits are randomly selected from 0, 3, 2, 4 and 5 to form two digits. Those that are multiples of 3 are: those that are multiples of 2 and 5 are: those that are multiples of 2 and 3 are:
3. The fourth number is ()
4. 2, 0.9, 1.5, three numbers and () can form a proportion
5. The four numbers of 0.3, 0.5, 1.5 and 0.9 can make up the proportion,
6. 9. The four numbers 7, 18 and 20 can form several groups of Coprime numbers
7. A number can be proportional to 0.16, 0.32 and 0.4, which may be
8. In a proportional formula, the sum of the two external terms is 37, the difference is 13, and the ratio of the two ratios is 5 / 6?
9. In a formula, the sum of the two external terms is 38, the difference is 22, and the ratio of the two ratios is eight fifths Let's talk about it
10. In a proportion, the two internal terms are equal, and the ratio of the two ratios is two-thirds. Write the proportion formula
11. X 10 5 x 10 6 =1000
12. 10. The four numbers 8, 6 and 4 are composed of 24 (each number is used at least once)
13. Use four 3's and three 0's to form a read-only number of three 0's Fast
14. Three sevens and three zeros are read-only. How to write the number of two zeros
15. Three, four, five and a can be used to form a proportion. The maximum of a is [], and the minimum of a is []
16. Select nine numbers from the ten numbers of 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9 to form a two digit number, a three digit number and a four digit number, so that the sum of the three numbers equals 2010, then the unselected number is______ ．
17. Use 2, 5, 4 and 8 to form two two digit numbers. The product of the two two digit numbers is the largest______ The smallest is______ ．
18. Observe the following formulas: √ 1 + 1 / 3 = 2 √ 1 / 3, √ 2 + 1 / 4 = 3 √ 1 / 4, √ 3 + 1 / 5 = 4 √ 1 / 5 ·
19. What rules do you find by observing the following formulas 1*3+1=2*2 2*4+1=3*3 3*5+1=4*4 …… Do you have similar questions
20. The number of columns 2, 6, 12, 20, 30 Find the 20th number and the 99th number