1) [tex]\frac{4}{5}[/tex]
[tex]\frac{2}{5}[/tex] + [tex]\frac{2}{5}[/tex] = [tex]\frac{4}{5}[/tex]
2) [tex]\frac{1}{2}[/tex]
[tex]\frac{8}{12}[/tex] - [tex]\frac{2}{12}[/tex] = [tex]\frac{6}{12}[/tex] ÷ [tex]\frac{6}{6}[/tex] = [tex]\frac{1}{2}[/tex]
3) [tex]1\frac{2}{15}[/tex]
[tex]\frac{4}{5}[/tex] + [tex]\frac{1}{3}[/tex] = n
[tex]\frac{4}{5}[/tex] = [tex]\frac{12}{15}[/tex]
[tex]\frac{1}{3}[/tex] = [tex]\frac{5}{15}[/tex]
[tex]\frac{12}{15}[/tex] + [tex]\frac{5}{15}[/tex] = [tex]\frac{17}{15}[/tex] or [tex]1\frac{2}{15}[/tex]
4) [tex]\frac{3}{14}[/tex]
[tex]\frac{2}{4}[/tex] - [tex]\frac{2}{7}[/tex] = n
[tex]\frac{2}{4}[/tex] = [tex]\frac{14}{28}[/tex]
[tex]\frac{2}{7}[/tex] = [tex]\frac{8}{28}[/tex]
[tex]\frac{14}{28}[/tex] - [tex]\frac{8}{28}[/tex] = [tex]\frac{6}{28}[/tex] ÷ [tex]\frac{2}{2}[/tex] = [tex]\frac{3}{14}[/tex]
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