In this way, the teacher's practice is unreasonable. Although this strengthens the subject of geography, it takes up the class time of mathematics, which is neither desirable nor reasonable. Give you some advice:

(1) Finish the task on time and avoid failing the exam, and you won't have such troubles.

(2) It is better for the class teacher to discuss the response with the geography teacher.

(3) Absence from math class is fatal. You must use your spare time to ask your teachers and classmates to make up for what you left behind.

I hope my answer is helpful to you.