Is there a foolproof methodology you would suggest?
Back to overview
0
Question merged
This question is read-only because it has been merged with
Tips to do big multiplications in my mind
Which is the most efficient way to multiply large numbers without losing track of zeros?
1
3.9k
Be the first to answer!
Nobody has responded to this question yet.
Top answer
Vlad
edited on May 24, 2017
Coach
McKinsey / Accenture Alum / Got all BIG3 offers / Harvard Business School
Sure, always use 10^power instead of zeros
Example:
300x9000 = 3*10ˆ2 x 9*10ˆ3=3x9*10ˆ(2+3)=27*10ˆ5
Handwritten it looks not that complicated. If you get used to writing all the numbers that way, you will never loose zeros and all multiplications/divisions will be replaced with + or -.
Good luck!
0 comments
Sign up for free to read all answers.
Sign up for free to read all answers.
Similar Questions
Most Popular Posts
My biggest fear
9
on Apr 15, 2026
Europe
10
100+
Top answer by
Franco
Coach
Ex BCG Principal & Global Interviewer (10+ Years) | 100+ MBB Offers | 95% Success Rate
10 Answers
100+ Views
+7
How do referral work?
8
on Apr 15, 2026
Europe
9
200+
Top answer by
Franco
Coach
Ex BCG Principal & Global Interviewer (10+ Years) | 100+ MBB Offers | 95% Success Rate
9 Answers
200+ Views
+6
I got fired from a T2 and struggling to find a job
10
on Apr 16, 2026
UK
8
100+
Top answer by
Franco
Coach
Ex BCG Principal & Global Interviewer (10+ Years) | 100+ MBB Offers | 95% Success Rate
8 Answers
100+ Views
+5
Not getting responses from LinkedIn outreach or post-event follow-ups — what am I doing wrong?
15
on Apr 17, 2026
USA
8
100+
Top answer by
Soheil
Coach
INSEAD | EM & Strategy Consultant | 3.5Y Consulting | 5★ Case Coach | 350+ Cases | 50+ Live Interviews | MBB-Level
8 Answers
100+ Views
+5
Question: "Is there something we haven't asked you that we should?"
9
on Apr 20, 2026
Europe
10
200+
Top answer by
Soheil
Coach
INSEAD | EM & Strategy Consultant | 3.5Y Consulting | 5★ Case Coach | 350+ Cases | 50+ Live Interviews | MBB-Level
10 Answers
200+ Views
+7