a)
[tex]2 \frac{3}{5} + 1 \frac{1}{4} + 3 \frac{2}{5} = 6 + 1 \frac{1}{4} = 7 \frac{1}{4} [/tex]
b)
[tex]5 \frac{1}{3} + 3 \frac{1}{5} + 1 \frac{2}{3} = 7 + 3 \frac{1}{5} = 10 \frac{1}{5} [/tex]
c)
[tex]8 \frac{7}{12} + 3 \frac{13}{15} + 3 \frac{2}{12} + 2 \frac{3}{12 } = 14 + 3 \frac{13}{15} = 17 \frac{13}{15} [/tex]
d)
[tex]3 \frac{2}{7} + 4 \frac{5}{9} + 2 \frac{6}{7} + 1 \frac{2}{9} + 2 \frac{2}{9} = 5 \frac{8}{7} + 8 = 6 \frac{ 1}{7} + 8 = 14 \frac{1}{7} [/tex]
