Depending on the "computer" definition, but without one, 10k seems too small number for the whole Soviet Union. Even brief fact check finds BK-0100 were to be used in all schools since 1984 in addition to Agat PC (Apple II clone) produced since 1983 aimed for schools too.
- https://en.m.wikipedia.org/wiki/Agat_(computer)
- https://en.m.wikipedia.org/wiki/Electronika_BK