She is having so much trouble. She was multiplying at the end of last year, but now she is having trouble adding and subtracting. I'll do a few problems with her to make sure she knows she can do it, then she'll turn in the lesson with half of the problems wrong. I'll check it and give it back to her and they're still wrong...just with different wrong answers. Is anyone else having math difficulties like this? I'm wondering if it's only becasue it's the first couple of weeks of school and she's having a hard time remembering or getting back into the groove...any advice? After the third time today handing it in with the problems still incorrect, I put it away for tomorrow. I fear discouraging her. For the record, I think she is trying, I'm just not sure what this means. If I write the problems on the board, she tells me exactly what to write and where to write it with no help, and makes no mistakes...but when she does it independently, they're all wrong.
I wonder if she could be a bit dyslexic as I am typing
...she still gets her 9's and P's and her b's and d's mixed up...Thanks!
If dd doesn't understand a concept, I do a full review page the following day, then we review periodically. I think it's okay to help her talk or think through the problem until you feel she gets it. It's not a race. If she doesn't remember adding and subtracting, then she won't remember multiplication. Play some more add/sub games. Go through fact families. 
And when you use different math programs, they use different ways, lingo, etc. So go over it on her paper with her after the board. Just take it slow. We had the same problem around that same age and then dd just got it.
Singapore is advanced, so I wouldn't worry about "catching up". I would just plan to do the A and B book each year. My second son is very mathy and completing 5A/5B in sixth grade. It is plenty challenging and is not holding him back in any way!