This Year 3 10 or 100 More or Less Discussion Problem resource has been designed to provide learners with more opportunities to enhance their reasoning and problem-solving skills through more challenging activities. In this task children use a key to work their way through a maze, adding or subtracting 10 or 100 with each move and meeting given criteria. Learners can work in pairs or small groups to discuss with each other about how best to tackle the problem.