There are several synonyms for the phrase "doest addition". Some of the most common include the following: perform addition, carry out addition, execute addition, enact addition, accomplish addition, conduct addition, and complete addition. In general, these synonyms all refer to the act of adding two or more numbers together in order to arrive at a sum or total. While they may differ somewhat in their emphasis or connotations, they are all useful terms for describing the process of performing basic arithmetic calculations. Whether you are a student, a teacher, or just someone who enjoys working with numbers, these synonyms can help you to communicate more clearly and effectively about the process of addition.