What you described is the first step of introducing addition. Number bond basically is just how many different addition problems give you the same answer. Decomposition is the natural extension of that. Very naturally these skills lead to adding numbers great than 10. My first grader never had a problem doing any of these. Maybe the words are big, but the concept is not tripping up the kids. It might be tripping up the parents who grew up in a different environment, but the kids don't have any issues with this concept if this is how they are taught.