Sagot :
pour le 1 et le 2 je trouve la meme solution
3) [tex] \frac{2}{9} - \frac{21}{36} = \frac{8}{36} - \frac{21}{36} = -\frac{13}{36} [/tex]
4) -1+8 * [tex] \frac{7}{9} [/tex] = -1+[tex] \frac{56}{9} [/tex]=[tex] \frac{47}{9} [/tex]
5) [tex] \frac{-18-10}{15} * \frac{1}{5} = \frac{-28}{15} * \frac{1}{5} = -\frac{28}{75} [/tex]
6) [tex] \frac{3}{4} * \frac{-9}{8} + \frac{5}{6} = \frac{-27}{32} + \frac{5}{6} = \frac{-162+160}{192} = -\frac{1}{96} [/tex]
7)[tex](\frac{11}{7} - \frac{35}{7}) * \frac{21}{2} = \frac{-24}{7} * \frac{21}{2} =-36[/tex]
8)
3) [tex] \frac{2}{9} - \frac{21}{36} = \frac{8}{36} - \frac{21}{36} = -\frac{13}{36} [/tex]
4) -1+8 * [tex] \frac{7}{9} [/tex] = -1+[tex] \frac{56}{9} [/tex]=[tex] \frac{47}{9} [/tex]
5) [tex] \frac{-18-10}{15} * \frac{1}{5} = \frac{-28}{15} * \frac{1}{5} = -\frac{28}{75} [/tex]
6) [tex] \frac{3}{4} * \frac{-9}{8} + \frac{5}{6} = \frac{-27}{32} + \frac{5}{6} = \frac{-162+160}{192} = -\frac{1}{96} [/tex]
7)[tex](\frac{11}{7} - \frac{35}{7}) * \frac{21}{2} = \frac{-24}{7} * \frac{21}{2} =-36[/tex]
8)