a: \(\dfrac{9}{25}+\dfrac{6}{25}=\dfrac{9+6}{25}=\dfrac{15}{25}=\dfrac{3}{5}\)
b: \(-\dfrac{4}{7}+\dfrac{11}{7}=\dfrac{-4+11}{7}=\dfrac{7}{7}=1\)
c: \(\dfrac{-1}{8}+\dfrac{-5}{8}=\dfrac{-1-5}{8}=-\dfrac{6}{8}=-\dfrac{3}{4}\)
d: \(\dfrac{8}{24}+\dfrac{-12}{24}=\dfrac{8-12}{24}=\dfrac{-4}{24}=-\dfrac{1}{6}\)
e: \(\dfrac{1}{6}+\dfrac{5}{6}=\dfrac{1+5}{6}=\dfrac{6}{6}=1\)
f: \(\dfrac{5}{12}+\dfrac{7}{-12}=\dfrac{5-7}{12}=\dfrac{-2}{12}=-\dfrac{1}{6}\)
g: \(\dfrac{3}{8}+\dfrac{5}{-8}=\dfrac{3}{8}-\dfrac{5}{8}=\dfrac{3-5}{8}=-\dfrac{2}{8}=-\dfrac{1}{4}\)
h: \(-\dfrac{3}{7}+\dfrac{5}{-7}=\dfrac{-3-5}{7}=-\dfrac{8}{7}\)
i: \(\dfrac{1}{-5}+\dfrac{9}{-5}=\dfrac{1+9}{-5}=\dfrac{10}{-5}=-2\)
