Substitution with negatives dot to dot

I love dot to dot puzzles and have created many over the last few years. The objective is to join the question number to its answer (not the next number). If done correctly then no lines should go in any direction other than horizontally or vertically allowing students to immediately know if they are going wrong and for the teacher to quickly assess how they are getting on. This worksheet creates a maze which when complete the students can try to find their way through. PS - students love this resource.