Calculer ,puis simplifier si possible les fractions suivantes: A=-9/8+15/8 B=17/12-11/3 C=3/4-4/3 D=2+5/6-7/2

[tex]A= \frac{9}{8}+ \frac{15}{8}= \frac{9+15}{8}= \frac{24}{8}=3\\\\ B= \frac{17}{12}- \frac{11}{3}= \frac{17}{12}- \frac{44}{12}= \frac{17-44}{12}= \frac{-27}{12}\\\\ C = \frac{3}{4}- \frac{4}{3}= \frac{9}{12}- \frac{16}{12}= \frac{9-16}{12}= \frac{-7}{12}\\\\ D= 2 + \frac{5}{6}- \frac{7}{2}= \frac{24}{12}+ \frac{10}{12}- \frac{35}{12}= \frac{24+10-35}{12}= \frac{-1}{12} [/tex]