<p>I recommend practice. Just do more sections. 650-800 is generally reckless mistakes and timing. With each mistake just remember to teach yourself how to avoid that exact mistake and future similar mistakes. For example, I messed up once because I didn’t read the word problem carefully enough: Future - ALWAYS REREAD THE WORD PROBLEM, not only the question.</p>
<p>I got 800 a couple times, not consistent though. Starting was 700.</p>
<p>Don’t know about Barron’s 2400. It’s not like we don’t know how to solve the problem right? Just stupid (like adding wrong) mistakes. My tip for stupid mistakes: don’t be an idiot. Use a calculator to double check for idiocy.</p>