| Roman numerals are fine for recording numbers, and for doing simple additions and subtractions, which meant they were adequate, if somewhat cumbersome, for commerce and trade. |
| In the spirit of deliberative democracy, revisions, refinements, additions, subtractions, and criticisms of this model are all welcome. |
| Page by page, they put it in the right order and made the relevant additions and subtractions until perfection was attained. |
| The stats used for the game are from the 15th of January and since then there have been some additions or subtractions to every team. |
| Apart from additions and subtractions, they also multiply, divide, calculate square roots, etc, all in a matter of seconds. |
| Another method that many shoppers used to decide between two options was to calculate the price differential, a procedure that requires just two subtractions. |
