| A | B |
| sum | the amount obtained by adding; the total |
| column | written as one thing under the other |
| solve | to find answer to a problem |
| estimate | to quickly find an answer that is close to an exact answer |
| add | put numbers together; find the total |
| vertical | numbers placed one below the other |
| regroup | to rename and then carry a tens digit to the place on the left when adding |
| plus | the symbol or word that means to add |
| horizontal | written across the page from left to right |