I apologize if this question has been asked before. I received a peer-review invitation from a journal to review a paper. In the email there is just the author's name and the title of the article and an abstract. I should just tell them if I accept to review the paper or not by clicking on corresponding links.
Is it normal to ask the journal to send the entire paper before accepting to review it? Isn't this request odd? I am potentially interested to review the paper (from the abstract, I guess I am familiar with the methods), but I would like to see the content to be sure if the methods used in the paper aren't beyond my knowledge and to check if I have enough time to review the paper (e.g., to avoid a surprise manuscript of > 150 pages!) If that matters, the subject is mathematics.