Across
- 8. 2x(3+5)=16
- 9. 6/2=3
- 13. not equal sign
- 15. 4<5
- 16. 2³=8
- 17. 3∓5=-2 and 8
- 18. minus sign
- 19. equals sign
- 20. horizontal line
Down
- 1. approximately equal
- 2. 2^3=8
- 3. plus sign
- 4. 3±5=8 and -2
- 5. [(1+2)x(1+5)=18
- 6. 5>4
- 7. modulo
- 10. 2*3=6
- 11. times sign
- 12. 6÷2=3
- 14. .