Across
- 2. grouping of addends doesn't effect outcome
- 4. the numbers we add together to get a sum
- 5. about how many
- 7. uses front digits only
- 8. another name for regrouping
- 9. order of addends doesn't effect outcome
Down
- 1. to rearrange in a new group
- 3. opposite operations
- 4. lines up in same column
- 6. answer to an addition problem