Math perfectionism

I have not used TT before, but could you pretend the text and give her a heads up with what is coming and maybe even sit with her while she works?

For example, my oldest would get frustrated when she got to long division, it is time consuming. I let her know it just takes time and at any time she could ask me to check her work so that she did not get discouraged when doing a problem and would get to the end and have it wrong because a simple error earlier on in the problem. When my next child came to that point, I was able to let him know before he even started learning it, that it takes time and ask for help as needed. Yes, time consuming but all part of the process. Since I was able to just sit and work through the problems with them, catching errors as they worked instead of waiting until the end of a worksheet and thrnhaving errors, it helped keep their confidence higher through more challenging new things. I still do that with my oldest who gets discouraged faster. She is in Algebra 1 and usually when she learns something knew she sits at my desk and works with me for a couple days, I check her work as she works through the problems, to make sure she is following steps and keeping on track and positive along the way.