When she is comfortable with this, cut the pictures into more pieces. Whatever you do, keep it fun. Give her tasks to do right now that you know she can do. When she is comfortable doing them, gradually make them harder. It sounds to me that she is in danger right now of being convinced that she can't do math.
Failure begets failure.
Be sure that she gets all the help and encouragement she needs, but minimize the pressure. My heart goes out to you and your little girl. I wish she could be in my class.