4+2/3 , 3/11 + 7/11 , 4/7+3/7,1-5/8,5 8/9-3 1/9 4 7/12 + 2 5/12 3 9/16 + 1 11/16 , 8 1/5 - 6 4/5

4+2/3=4[latex] \frac{2}{3} [/latex], 3/11 + 7/11=10/11 4/7+3/7=7/7=1 1-5/8=3/8 5 8/9-3 1/9=2  7/9  4 7/12 + 2 5/12 =7 3 9/16 + 1 11/16 =5  2/8  8 1/5 - 6 4/5=1  2/5

[latex]4 + \frac{2}{3} =4 \frac{2}{3} \\ \\ \frac{3}{11} + \frac{7}{11} = \frac{3+7}{11} = \frac{10}{11} \\ \\ \frac{4}{7} + \frac{3}{7} = \frac{7}{7} =1 \\ \\ 1- \frac{5}{8} = \frac{8-5}{8} = \frac{3}{8} \\ \\ 5 \frac{8}{9} -3 \frac{1}{9} =(5-3) + \frac{8-1}{9} = 2 \frac{7}{9} \\ \\ 4 \frac{7}{12} +2 \frac{5}{12} = 6+ \frac{12}{12} =7 \\ \\ 3 \frac{9}{16} + 1 \frac{11}{16} = 4+1 \frac{4}{16} =5 \frac{4}{16} =5 \frac{1}{4} \\ \\ [/latex] [latex]8 \frac{1}{5} -6 \frac{4}{5} = (7+ \frac{5+1}{5} ) - 6 \frac{4}{5} = 1 \frac{2}{5} [/latex]