decimal grids

Hi Dorothy,
I'm brailling a 6th grade math text in which decimal grids appear (see attachments)
I want to know if the following braille for Activity 1 would be acceptable:

[=][=][=][=][=][=]["]["]["]["]
[=][=][=][=][=][=]["]["]["]["]
[=][=][=][=][=][=]["]["]["]["]
[=][=][=][=][=][=]["]["]["]["]
[=][=][=][=][=][=]["]["]["]["]
[=][=][=][=][=][=]["]["]["]["]
[=][=][=][=][=][=]["]["]["]["]
[=][=][=][=][=][=]["]["]["]["]
[=][=][=][=][=][=]["]["]["]["]
[=][=][=][=][=]["]["]["]["]["]
[=][=][=][=][=]["]["]["]["]["]

and if the following would work for Activity 3:

[-][-][=][=][=][=][=][=][=][=]
[-][-][=][=][=][=][=][=][=][=]
[-][-][=][=][=][=][=][=][=][=]
[-][-][=][=][=][=][=][=][=][*]
[-][-][=][=][=][=][=][=][=][*]
[-][-][=][=][=][=][=][=][=][*]
[-][-][=][=][=][=][=][=][=][*]
[-][-][=][=][=][=][=][=][=][*]
[-][-][=][=][=][=][=][=][=][*]
[-][-][=][=][=][=][=][=][=][*]
[-][-][=][=][=][=][=][=][=][*]
[-][-][=][=][=][=][=][=][=][*]
[-][-][=][=][=][=][=][=][=][*]

and for Activity 4:

[-][-][-][-][-][-][*][*][*][*]
[-][-][-][-][-][-][*][*][*][*]
[-][-][-][-][x][=][=][=][=][=]
[-][-][-][-][x][=][=][=][=][=]
[-][-][-][-][x][=][=][=][=][=]
[-][-][-][-][x][=][=][=][=][=]
[-][-][-][-][x][=][=][=][=][=]
[-][-][-][-][x][=][=][=][=][=]
[-][-][-][-][x][=][=][=][=][=]
[-][-][-][-][x][=][=][=][=][=]

Maybe you have a better suggestion. I really appreciate your help

Fran