a)
[tex] \frac{1}{9} + \frac{5}{9} = \frac{6}{9} = \frac{2}{3} [/tex]
b)
[tex] \frac{5}{9} + \frac{7}{9} = \frac{12}{9} = \frac{4}{3} = 1 \frac{1}{3} [/tex]
c)
[tex]3 \frac{2}{7} + \frac{3}{7} = 3 \frac{5}{7} [/tex]
d)
[tex]2 \frac{4}{7} + 3 \frac{6}{7} = 5 \frac{10}{7} = 6 \frac{3}{7} [/tex]
e)
[tex] \frac{13}{15} - \frac{9}{15} = \frac{4}{15} [/tex]
f)
[tex]3 \frac{15}{23} - 1 \frac{11}{23} = 2 \frac{4}{23} [/tex]
g)
[tex]9 - \frac{6}{7} = 8 \frac{1}{7} [/tex]
h)
[tex]5 \frac{3}{8} - 2 \frac{5}{8} = 4 \frac{11}{8} - 2 \frac{5}{8} = 2 \frac{6}{8} = 2 \frac{3}{4} [/tex]
