Is there a foolproof methodology you would suggest?
(edited)
Which is the most efficient way to multiply large numbers without losing track of zeros?
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!
(edited)
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