You mean 1/2 + 1/4? Imagine as quarters from a dollar, ok? Each quarter is 25 cents and if you have two, that makes it fifty. If you have two fifty cents, that makes a dollar (1/2+1/2=1). So, fifty cents plus a quarter is what? 75 cents? Yes.
19 and 3/4
4 and (not an!) a half.
5.25, or 5 and 1 quarter (5 1/4)
One fourth plus one half plus one half plus 1 is equal to 2.25 or 2 1/4
1/8
1/4 + 1/4 = 1/2 1 quarter + 1 quarter = 1 half
19 and 3/4
seven eighths
4 and (not an!) a half.
1/2 + 1/2 + 1/2 + 1/2 = 2 2 is four halves.
5.25, or 5 and 1 quarter (5 1/4)
One fourth plus one half plus one half plus 1 is equal to 2.25 or 2 1/4
1/8
1
three halves or 3/2 = 1 1/2
One half plus one half makes 1. 1/2 + 1/2 = 2/2 or 1
1/2 plus 1/2 plus 1/4 plus 3/4 is two.