- Mathematical estimation - Maths operation - Reckoning - type of estimation in the mathematical field of numerical analysis - The act or process, or the result, of calculating;
computation; reckoning, estimate. - An expectation based on circumstances.
- A calculated operation - Besides, in ... to - House extension - Maths operation - The act of adding two or more things together; -- opposed
to subtraction or diminution. - Anything added; increase; augmentation; as, a piazza is
an addition to a building. - That part of arithmetic which treats of adding numbers.