Divisibility Rule for 7 #math #mathinstruction

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This video explains how to easily determine if a number is divisible by 7.
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Take the rightmost digit times two, subtract it from the other digits, repeat. It's faster.

BlackEyedGhost
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The rule I learned for 7 is double the last digit then subtract it from the rest

nickronca
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Or just do long division in your head😅?
They said these tips and tricks would make math easier...it didnt, lol
Im so glad i went to school before the new ways to do math!

SarahA
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