Across
- 3. Seventy minus twenty
- 5. Eighty minus fifty
- 7. Ten plus ten
- 10. Nine plus nine
- 11. Five hundred plus five hundred
- 12. Five plus six
- 13. Thity plus thirty
- 14. Five plus seven
Down
- 1. Thirty plus thirty
- 2. One hundred minus twenty
- 4. Seventeen minus four
- 6. Sixty plus forty
- 8. Forty plus fifty
- 9. Ninety minus twenty