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Question merged

This question is read-only because it has been merged with Tips to do big multiplications in my mind.

1

Which is the most efficient way to multiply large numbers without losing track of zeros?

Is there a foolproof methodology you would suggest?

Is there a foolproof methodology you would suggest?

(edited)

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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!

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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