Oh, come on. I'm not talking about a home-brew slide rule or a virtual slide rule simulation. Obviously it is possible to make those. I'm talking about an actual manufactured slide rule sold as a product and used in a working environment to perform addition.
Most slide rules have a linear scale on them, but it is intended to be used along with a logarithmic scale for working with exponential/logarithm functions.
In general slide rules aren’t used for addition because 3-digit addition is very fast to compute mentally or using pen and paper.
Oh, come on. I'm not talking about a home-brew slide rule or a virtual slide rule simulation. Obviously it is possible to make those. I'm talking about an actual manufactured slide rule sold as a product and used in a working environment to perform addition.