Divide 19,20,21,22 into 24 by "+. -. *"——

22+(19+21)/20=24

RELATED INFORMATIONS

1. There is a number string: 1.4.7.10.13.16.19.22.25 Is natural number 2005 in this string? If it is, which number is it? If not, please explain the reason
2. Among the 13 numbers 1, 4, 7, 10, 13, 16, 19, 22, 25, 28, 31, 34 and 37, at least how many numbers can be taken out to ensure that there are many numbers in them The sum of the numbers is 38? And explain the reason
3. There is a string of numbers: 1,4,7,10,13,16,19,22,25 '. Please calculate the sum of the first 100 numbers of this string
4. There are a series of numbers: 1,4,7,10,13,16,19,22,25,,,, help There are a series of numbers: 1,4,7,10,13,16,19,22,25 (1) Calculate the sum of the first 100 numbers (2) Is 2005 in here? Why?
5. The number of a column is grouped as follows: (1), (4,7), (10,13,16), (19,22,25,28) What's the row and position of 2005?
6. Calculate 1 × 4 + 4 × 7 + 7 × 10 +... + 19 × 22 + 22 × 25
7. 1 * 1 / 4 + 4 * 1 / 7 + 7 * 1 / 10 + 10 * 1 / 13 + 13 * 1 / 16 + 16 * 1 / 19 + 19 * 1 / 22?
8. Calculation: 1 / 1 × 4 + 1 / 4 × 7 + 1 / 7 × 10 + 1 / 10 × 13 + 1 / 13 × 16 + 1 / 16 × 19 + 1 / 19 × 22 =?
9. From 1 to 9, fill in the following formula () + () = (), () - () = (), () + ()=（ From 1 to 9, the number can not be repeated, each number can only appear once, fill in the following formula () + () = (), () - () = (), () + ()=（
10. (a+b)(a2_ ab+b2).
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13. According to the rule, fill in the appropriate number in (), a.1/1, 7 / 8, 5 / 6, 13 / 16, 4 / 5, 19 / 24, (), B, 1 / 3, 1 / 2, 5 / 9, 7 / 12, 3 / 5, 11 / 18, ()
14. Help to find the rule 2, 3, 5, 9, 19. What's the next number 2, 3, 5, 9, 19. What's the next number
15. Find the rules: 7 in the first line, 19 in the second line, 37 in the third line, how many in the sixth line, and how many in the nth line
16. (Mathematics) find the law 5,6,19,17, (), - 55, in which 344 is filled in brackets. How do you calculate it It is to find out the law of 5,6,19,17344, - 55
17. Fill in 1.1, 1, 2, 3, 5, 8, (), 21, 34, 55, 2.190, 94, 46, 22, (), ()
18. What should I fill in after 1 22 2 44 3 55
19. Fill in the blanks 1, 22, 2, 44, 3, 55, (), () Why?
20. There is an electronic clock, which lights up every 9 minutes, rings at 12 o'clock, and lights up at 12 o'clock. When is the next time?