If you can figure out these formulas in your head / on paper, then I say "more power to you!".
However... On the PMP Exam you have just 1.2 minutes to answer each question. So don't make this harder on yourself than necessary. During the exam you can use an on-screen calculator (windows based) and you don't have to calculate anything by hand.
In fact, I recommend that you use the on-screen calculator even if you have to calculate 2*5=? because the exam is a stressful time and you could easily make a mistake and then 2 times 5 is suddenly 12.
Until Next Time,
Cornelius Fichtner, PMP, CSM
President, OSP International LLC
Moderators: Yolanda Mabutas, Ahmed Amin, Scott Gillard, Mary Kathrine Padua, ERIC BARTLETT, Gail Freedman, Kevin Nason, Steven Mudrinich, PMP, Mark Wuenscher, PMP, John Wolverton, Tracy Shagnea, PMP, Jada Garrett
This interview with Simona Fallavollita (LinkedIn Profile) was recorded at the magnificient Project Management Institute (PMI)® Global Conference 2017 in Chicago, Illinois. We discuss the how, what, why and when of the changes that are coming to the PMP exam.