Is Mathematics tough?
It's all about your child's mindset and his or her experience in Mathematics ... talk to your child on what are the dificulties that he/she is facing (e.g. do not understand the language of math? confuse on the language use? can't catch up with school teaching? math teacher is too fierce/unapproachable/unencouraging? etc ... and solve the root of the problem!! Only then, learning will take place!!:)