Im sure many of you know this already, but I just discovered it a couple weeks ago, and it's made my life a whole lot easier.
Let's say the work order calls for something 7-7/8 wide. You can look up 7/8 on a chart, or do the math with a calculator, or know that 7/8 is. .875
But... You can just type it in as 7 7/8=
When you hit the "=" it does the math and Ta-Da! It changes it to 7.875
This has made things go so much faster for me.