2/3+1/4 4/5-3/4 1/2-1/3 5/6+3/8

[latex] \frac{2}{3} + \frac{1}{4} = \frac{4*2+3*1}{12} = \frac{8+3}{12} = \frac{11}{12} [/latex] [latex] \frac{4}{5} - \frac{3}{4} = \frac{4*4-5*3}{20} = \frac{16-15}{20} = \frac{1}{20} [/latex] [latex] \frac{1}{2} - \frac{1}{3} = \frac{3-2}{6} = \frac{1}{6} [/latex] [latex] \frac{5}{6} + \frac{3}{8} = \frac{4*5+3*3}{24} = \frac{20+9}{24} = \frac{29}{24} =1 \frac{5}{24} [/latex]