0 is something called the additive identity: If you add (or subtract) it from something, the something remains unchanged.
It is also something called the multiplicative zero (sounds obvious doesn't it) in that multiplying something by it makes it equal to zero. Dividing 0 by 10 is the same as multiplying 0 with 1/10 . Therefore it makes it zero, just like anything else multiplied by zero. Simple!
Especially "
The following are some basic (elementary) rules for dealing with the number 0. These rules apply for any real or complex number x, unless otherwise stated.
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