This is a math puzzle. Use addition-minus-multiplication-division to multiply it.
You can try them: 1. https://scratch.mit.edu/projects/1081020448/ 2. https://scratch.mit.edu/projects/1081005486/ 3. https://scratch.mit.edu/projects/1080744081/ 4. https://scratch.mit.edu/projects/1080744866/ 5. https://scratch.mit.edu/projects/1081566600/ 6. https://scratch.mit.edu/projects/1081962091/ 7. https://scratch.mit.edu/projects/1081449766/ 8. https://scratch.mit.edu/projects/1082019089/ 9. https://scratch.mit.edu/projects/1082096073/ 10. https://scratch.mit.edu/projects/1082343861/
