Help me!!!!!! with this math problem?

Help me my math teacher gave us some homework sheets and in some it has these squares with litte boxes and the work is about subtracting,dividing,and multipliying so please help me I was absen a day and I don't know haw to do them I know how to divide and multiply but I don't know those little boxes work and I don't know how to subtract and do does little boxes best answer five stars