a)
[tex] \frac{23}{7} - \frac{5}{7} = \frac{18}{7} [/tex]
b)
[tex] \frac{72}{7} - \frac{5}{7} = \frac{67}{7} [/tex]
c)
[tex] \frac{45}{7} - \frac{5}{7} = \frac{40}{7} [/tex]
d)
[tex] \frac{54}{7} - \frac{5}{7} = \frac{49}{7} [/tex]
e)
[tex] \frac{17}{7} - \frac{5}{7} = \frac{12}{7} [/tex]
f)
[tex] \frac{23}{7} - \frac{5}{7} = \frac{18}{7} [/tex]
