The only way it makes any sense is if you did it quickly and sloppily.
If you were doing it quickly and to anything approaching a reasonable approximation of ‘your best’, then the teacher was just frustrated that the work was too easy for you any they hated seeing anyone getting a break but they saw no way to give you more work than the other kids. Most likely because they were too lazy to come up with a good tiered lesson plan.
The only way it makes any sense is if you did it quickly and sloppily.
If you were doing it quickly and to anything approaching a reasonable approximation of ‘your best’, then the teacher was just frustrated that the work was too easy for you any they hated seeing anyone getting a break but they saw no way to give you more work than the other kids. Most likely because they were too lazy to come up with a good tiered lesson plan.