You can represent the two fractions with one fraction with a numerator equal to the sum of the two individual numerators (with sign) and a denominator equal to just one of the two denominators.
That their sum is always equal to the denominator.
They will sum to the denominator.
1/3 + 1/2
1/2 + 1/2 = 1
the sum the sum
They are equivalent fractions, each equal to 0.2
Yes, but only if the two fractions are the same or equivalent fractions (other than 0).
No - one half plus one half equals one.
the difference between two equal fractions is zero.