This document discusses addition of whole numbers. It defines addition as bringing two or more numbers together to make a total. The parts of an addition equation are also explained. Examples are provided to illustrate addition problems and their solutions. An ESA method is introduced where E is for writing the equation, S is for showing the solution steps, and A is for the final answer. Key words that indicate when to use addition in word problems are listed. Videos with additional examples are also provided at the end.