You may be thinking of half brother vs step brother. Step brother- our parents are married, but you and I had 2 different parents. Half brother- you and I share one parent, but have one parent that is different.
There is no such thing as a half son, a stepson means that either the mother or father has remarried that makes the son of one parent the stepson of the other.
There is no difference between "half million" and "half a million." They both mean the same thing, five hundred thousand (500 000)
there isn't a difference
The difference between a variable resistor and a rheostat is the same as the difference between six and half a dozen.
there is no difference, half pipe snowboarding is just regualr snowboarding on a half pipe
40 minutes is what hour
The difference is 9 and a half hours.
They are the same, 500,000, 500k, or half ofa million.
There is not much or a difference, though cutting into, "Halves" means cutting something in half, then cutting it in half again.
56 and Half
one sixth
A sixth.
A hemisphere is half a sphere