Sweden was one of the few countries that did not close down their schools during the Covid-19 pandemic. Different hybrid teaching methods were adopted, some of which are here to stay. This qualitative study explores the challenges that Swedish mathematics teachers had transitioning from face-to-face to hybrid teaching and the coping strategies that they adopted to reduce the effect of these challenges on their practices, well-being and students' learning experiences. The results from the study were gathered from some 51 primary and secondary mathematics teachers in Stockholm using a semi-structured questionnaire. The data were analysed with cognisance of Lazarus and Folkman's coping theory and Simonson's equivalence theory. The results revealed that hybrid teaching had some negative impact on teaching quality, student achievement, student health, teacher workload, and teacher-student dialogue, which underpins the Swedish school curriculum. This lack of dialogue and high-quality interaction undermines the equivalency theory principle, which suggests that the format of instruction should not influence the quality of students' learning experiences. Also, the results revealed that majority of the teachers ascribed positively to problem-based coping strategies as compared to the emotion-based coping strategy as they worked hard to provide students with good learning opportunities.