Verified answer

a) [tex]\frac{13}{2} - \frac{11}{3} + \frac{1}{3}[/tex]

[tex]= \frac{39 - 22 + 2}{6}[/tex]

[tex]= \frac{19}{6}[/tex]

b) [tex]\frac{5}{18} + \frac{4}{9} - \frac{2}{3}[/tex]

[tex]=[/tex] [tex]\frac{5 + 8 - 12}{18}[/tex]

[tex]= \frac{1}{18}[/tex]

c) [tex]\frac{1}{2} + \frac{5}{6} + \frac{7}{6}[/tex]

[tex]= \frac{6 + 10 + 14}{12}[/tex]

[tex]= \frac{30}{12} :2 = \frac{15}{6} :3=\frac{5}{2}[/tex]

d) [tex]\frac{6}{7} - \frac{3}{8} + \frac{1}{4}[/tex]

[tex]= \frac{48 - 21 + 14}{56}[/tex]

[tex]= \frac{41}{56}[/tex]