Question

Me ajudem nessas operações porfavo

Answer 1

b) $(\frac{1}{2} )-(+\frac{5}{9})+(-\frac{4}{6} )=\frac{1}{2} -\frac{5}{9} -\frac{4}{6} =\frac{9-10-12}{18} =-\frac{13}{18}$

c) $(\frac{1}{2} -\frac{5}{2} )*(\frac{9}{4} +\frac{8}{5} )=(\frac{1-5}{2} )*(\frac{45+32}{20} )=\frac{-4}{2} *\frac{77}{20} =\frac{-308}{40}$

e)$(\frac{2}{5} ):(-\frac{3}{4} )=\frac{2}{5} *(-\frac{4}{3} )=-\frac{8}{15}$

f) $\sqrt{\frac{81}{64}} =\frac{9}{8}$