| A | B |
|---|
| sum | the answer in an addition problem |
| difference | the answer in a subtraction problem |
| bar model | horizontal bars used to show problems in picture form |
| comparison bar model | 2 bars used to solve problems |
| part-whole bar model | 1 bar divided into parts to solve problems |
| taking-away bar model | 1 bar to solve subtraction problem |
| adding-on bar model | 1 bar to solve addition problems |
| addition | altogether, more than, total |
| subtraction | less than, fewer than, difference |
| working backward | check your answer by... |
