addition

the act or process of adding; especially: the operation of combining numbers so as to obtain an equivalent simple quantity


division

the act or process of dividing : the state of being divided


multiplication

The act or process of multiplying or the condition of being multiplied


productive

 Effective in achieving specified results


subtraction

The arithmetic operation of finding the difference between two quantities or numbers


sum

An amount obtained as a result of adding numbers


unity

The state or quality of being in accord; harmony