Four fifths, two fifths, 0.2, (), one twentieth

Four fifths, two fifths, 0.2, (), one twentieth
0.8、0.4、0.2（）0.05
The rule is that starting from the second number, each number is 1 / 2 of the previous number, so 0.8, 0.4, 0.2 (0.1) 0.05

RELATED INFORMATIONS

1. 24 points () = () 21 points = () 15 points = 16 points () = 3 points of 8
2. (): 16 = 3 / 8 = () 24 = ()% Come on
3. 6 and 5 / 3 + 24-18 + 4 and 5 / 2-16 + 18-6.8-3.2 =?
4. (): 16 = 3 / 8 = () 24 = () 24 = ()%
5. （）÷24＝3/8=24:( )=( ):16
6. ( )：16=8\3=( ）÷24
7. 3.6.9.15.24. (). 63. ()
8. What is the law of 3,6,9,15,24, (), 63, ()
9. 0 39 24 63 () to find the law What is the number in the last bracket?
10. Find the rule and fill in {20,20,10} {18,16,8} {25, (), ()}
11. Find a rule: five quarters, two fifths, one fifths, one twentieth, one twentieth 2 / 3, 1 / 2, 3 / 2, 9 / 4, (), ()
12. Four fifths, two fifths, one fifths (), one twentieth, (), ()
13. 24 of 33 + 19 of 66
14. 3 5 8 12 () 20 24 55 83 () fill in the blanks according to the rules
15. 20.24.55.83.[ ]
16. A column of fractions: 3 out of 20, 5 out of 34, 8 out of 55, 12 out of 83. What's the next, the nth
17. 20/3,34/5,55/8,83/12,. What should be behind it
18. Regular filling: 3 / 20, 5 / 34, 8 / 55, 12 / 83 Fill in: 3 / 20, 5 / 34, 8 / 55, 12 / 83, (/) I hope the answer is not 118 / 17 I can see that the price of each item is 0.15
19. Fill in the following numbers: 1,1,2,3,5,8,13, (), 34,55
20. Find the rule 0,1,3,12, Urgent! Process!