I am a Montessori teacher and perhaps can offer some insights.
First, no one should be "making" your child do multiplication. It is true that four year olds in Montessori schools frequently do multiplication, but it should not be something that requires writing. There is a "game" that presents the concept of multiplication with the golden bead material (representing units, tens, hundreds, and thousands) in an active way in a small group setting. Presented this way it is not difficult at all, but is fun.
As with all work in the children's house (the class for children 2 1/2 to 6 years old) the child should *choose* their activities, never be forced or coerced.
If she doesn't like "paperwork" it is because very few four year olds do. Writing presents its own challenges and should not be coupled with the beginning math activities whose goal is facilitating an *experience*, not require mastery or written evidence. If she is already up to activities that do have writing (these would not be beginning activities) and she likes the activity but not the writing then she could be paired with a child who can write. There are other ways to work with a reluctant writer, but basically, if it is the writing that is discouraging her then there are ways to help indirectly (sewing activities, for example, or metal inset drawing, etc.). If it is that she doesn't like to be told to do multiplication, well, I guess I can't blame her. I love multiplication but don't like being told what to do, either!
Perhaps the teacher needs to present it again after a break of a few weeks. Sometimes the child is just not interested in what we present. Perhaps she wants to work in a different area for a while.
Please visit www.pleasantvalleymontessori.com/second/schedule.htm
to see what a typical day is like.
If you are wondering why we present multiplication at all to the children at this age, it is because if presented in the right way the children *love* it and develop a deep understanding of the concept. It is a game, a form of mental gymnastics. But, it should always be their choice.
I want to be clear that I am not criticizing your child's school or saying that the teacher is "making" her do things. I am not there and don't know. I just want to offer some possibilities.
Why doesn't your school go through the kindergarten year? That is very unusual.
As far as being bored in kindergarten, there will be a lot of new things for your child to do there even if the "academic" stuff has already been mastered by her.
Good luck and feel free to pm me with questions.