Math help

Good Morning Mamas and Papas, I’m needing some advice.  First, I have to say that math is the one subject my girls beg for everyday, but they just don’t understand.  My girls are 13 months apart and are 7 & 8 will be 8 & 9 in the next couple months.  We started in MUS Primer 3 years ago.  We didn’t even get half way through Primer.  They were so confused by the manipulatives and didn’t understand why 8s were not all brown, and all the other numbers weren’t the colors of the blocks.  We worked on MUS for 1.5 years and took a break.  We then switched to RS Level A, and we have been working at this for almost a year and are on Lesson 47.  They are struggling so much and just don’t get correlations at all, and we keep having to stop to repeat areas that they are just not getting.  They play the games so much and enjoy them.  They love all the manipulatives except the balance and that has throwing them both for a loop.  I took them both aside separately when we started with the balance to make sure they figured it out on their own, and it took almost a week for both of them to figure out the clue.   My husband who is brilliant in math has tried working with them, and he is as concerned as I am.  They are both reading and comprehending very well.  My 8 year old picked up Pride and Prejudice the other day and started reading it.  She can narrate it beautifully and adds in her own connections.  I have looked at right brain learner vs. left brain learner and neither one fits in either category.  They did spend the first 2 years of their lives in orphanages which wires the brain so much differently and my 8 year old has PTSD, but that is why I have started at the lowest level to give the best chance at understanding.  Help please.  Curriculum suggestions, tips, encouragement, really anything right now that is loving. 🙂  I have looked at Developmental Mathematics and wonder if adding that in will help. Thank you! ~April