Diabetes Question

[Keeperofbandages]

When doing a diabetic dosage calculation, do you use the correction formula + carb ratio (ex. 2.2 + 4.3 = 6.5 ( 7 units) or do you round the 2.2 (2) + 4.3 (4) = 6 units? I have heard that the first way I showed is the way they are calculating insulin now. How does everyone else calculate?

[MrNurse(x2), ADN]

I was taught so long ago and I never used this that I forgot how. I've only dealt with pumps so I am lucky.