1.
[tex]1 - \frac{1}{3} = \frac{2}{3} [/tex]
[tex]1 - \frac{2}{3} = \frac{1}{3} \\ \\ \frac{1}{3} + \frac{2}{3} = 1[/tex]
2.
a)
[tex]1 - \frac{3}{7} = \frac{4}{7} [/tex]
b)
[tex]1 - \frac{3}{4} = \frac{1}{4} [/tex]
c)
[tex]2 - \frac{4}{5} = 1 \frac{1}{5} [/tex]
3.
[tex]1 \frac{2}{3} - \frac{1}{3} = 1 \frac{1}{3} [/tex]
[tex]3 \frac{4}{5} - 2 \frac{3}{5} = 1 \frac{1}{5} [/tex]
[tex]5 \frac{5}{7} - 2 \frac{2}{7} = 3 \frac{3}{7} [/tex]
