I got busy today and found a lot of your information. It's very hard to do something like this in a logical order; please just print this off and forgive me for the jumble.
If you happen to be an Ancestry subscriber, you can get to the records I will describe.
The 1925 Iowa State census is a gold mine of information. To get to it in Ancestry, click on Search (I used the old search), then Iowa, click on view all 20 Iowa Census & Voter Lists, find the Iowa State Census collection, 1826-1925 and enter Sramek. In the 1925 census, the person LISTED THE NAMES OF THEIR PARENTS, including mother's maiden name!
Each entry took 3 pages, I think, so once you click on the name, look at the image, you have to click on the next page.
But first, let's look at the 1915 census.
In the 1915 census, the entries are on cards, possibly 3 x 5. When you locate one of the Sramek entries, scroll backwards and forwards. They are in alphabetic order, not by household. The first one is image 35082 of 41917. You can identify the family members by the P.O. box entries.
Grouped by family:
1932 S. 8 St.
Joseph age 44
Josephine age 41
Adolph age 17
John age 11
Mary age 8
Paul age 8
Vlasta age 14
1607 K st W (who are these kids living with? No parents with surname Sramek.)
Albie age 9
Anna (or Alma) age 3
Christie age 14
Frank age 15
Joseph age 12
Tillie age 10
1100 7 St. (your group)
Charlie age 42
Anastasie age 36
Chas age 21
Francis age 14 (female)
573 So 10 St W
Lewis J. age 53
Marie age 38
Edward age 3
1001 So 8 St.
Staze age 18 (occupation stenographer)
Room 123 Grand Hotel
Frank W. age 19
From this list, we cannot tell where Staze age 18 and Frank W. age 19 belong. One or both could be children of Charles and Stazy.
Now for the 1925 findings.
The second entry from the top for all Sramek for all census years is Frances Chehak, who appears to be married to Norbert Chehak, and whose parents are Charles and Stazy Sramek. They have transcribed Stazy's maiden name as Cock, but that is obviously incorrect. When I look at the image, line 81, image 185 of 207, I see Cvak, Stazy.
It gets better. About the 16th entry down, you get Stazy Sramek, 1925 on line 94, which is the 4th line from the top of the image which makes it easy to keep track of. She is age 45, and on image 2077 of 2274, her father is Wencil Cvrk (born in Iowa -- I don't think so) and her mother is Josephine Charper born in Bohemia. So now you have possible last names of Stazy's parents. Stazy is supposedly born in Bohemia, so I seriously doubt that her father was born in Iowa.
For Frances, age 24 in 1925, the marriage place of her parents from column H is Iowa. This means Charles and Stazy were married here.
And Charles Sramek is on line 93, his father is Matys Sramek, his mother Anna Vokurka. Does this take you back a generation?
Looking further, I located Charles and Stazy in the 1900 census, indexed as Sremek. Son Chas is 6, born Jan 1894, and daughter Stasy is 3, born July 1896. Charles and Stasy (parents) have been married 1 year, but Stasy is listed as the mother of 0 children, 0 living. Therefore, she must be a second wife. Charles immigrated in 1885, Stasy in 1883. Therefore, we can conclude that the Staze listed in 1915 is their (step)daughter.
I finally located them in the 1905 census, indexed as Szamek, on 1205 K St. Only names and addresses are recorded, Charlie, Frances, Stazie, Charlie, and Stazie.
So now you have two addresses where they lived: in 1905 on 1205 K St., and in 1915 1100 7 St. (but you already knew about this one.) In addition, you can read the addresses on the sides of the federal census. I don't recall if any were different.
I could not find either Stazy or Charles in the 1895 census, but the images are not available, so one is dependent on guessing how the names were transcribed. I did not try the 1885 census, but Stazy could be in it, since she came here in 1883.