The number, 0 is nothing, so some number + 0 is that number.
it is 10 times larger (of the number that was multiplied by 10 or added a zero at the end)
No number exists. . Zero is not a factor of any number but zero.
Because you can't divide nothing by something
Because division is asking how many of the number x would I give out to y groups, zero would represent y, how many of x would you give out to zero groups? My answer would be zero.