Figure up is a term used to describe the process of calculating or estimating a number or amount. It is often used in the context of mathematics, accounting, and other fields that require precise calculations. The term figure up can also be used to describe the process of solving a problem or puzzle. The crossword solution for figure up is 'RECKON, ' which is a synonym for the term figure up. RECKON is a verb meaning to calculate or estimate a number or amount.