This can't work with all numbers. 58x67 through this system gives you 751,386. 42+33 is 75 and 42x33 is 1,386 and together it's 751,386. Does it only apply to the 90's?
RE: Lifehack : How to multiply large numbers in your head
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Lifehack : How to multiply large numbers in your head
damn you are right lol, have to look into this
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i think the 90's because of the 2-number rule
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