Besides making sure that your child knows the basic facts, she needs to acquire strategies that will help her determine an answer when she can't immediately recall it. Strategies will stop your daughter from feeling frustrated when she doesn't know a fact. For example, if she can't add 9+2, she should know that she'll be able to get the answer by counting two beyond the number to be added and say, "Nine (the number to be added), ten, eleven."
You can't delay in finding a way to help your daughter improve her math skills. Her problems will only increase with multiplication on the horizon. You should consider hiring a high school student to work with your daughter as she might respond well to an enthusiastic young tutor. The local high school will have a list of students. Or you might consider sending your child to a learning center such as Kumon, Sylvan, or Huntington.
It will take time for your child to acquire the math skills she needs. However, every inch of progress will increase her belief that she can handle math and improve her self-confidence.