Across
- 4. easy concepts build on harder concepts
- 5. problems in math to challenge and develop skills
- 6. problems in math
- 8. homework
Down
- 1. a sign or character
- 2. is a list of things that are in order
- 3. is formed by or resulting from accumulation of the addition of successive parts of elements
- 7. a relationship or rule using numbers and letters