Question

-1целых 1/7*(4/5+19/20)*(6целых 5/6+4целых 2/3)= 9целых 1/6:(4 целых 1/3-8)+24*3/8= Пжжж помогите!!! Дам 20 балов!

Answer 1

Объяснение:

$-1\frac{1}{7} *(\frac{4}{5} +\frac{19}{20} )*(6\frac{5}{6}+4\frac{2}{3} )=-\frac{8}{7}*\frac{4*4+19*1}{20} *(\frac{41}{6} +\frac{14}{3}) =-\frac{8}{7}*\frac{16+19}{20}*\frac{41+14*2}{6} =\\ =-\frac{8}{7}*\frac{35}{20}*\frac{41+28}{6}=-\frac{8}{7} *\frac{7}{4} *\frac{69}{6}=-\frac{8}{7}*\frac{7}{4}*\frac{23}{2}=-\frac{8*7*23}{7*4*2} =-23.$

$9\frac{1}{6} :(4\frac{1}{3} -8)+24*\frac{3}{8} =\frac{55}{6}:(-3\frac{2}{3})+\frac{24*3}{8} =\frac{55}{6} :(-\frac{11}{3})+9=\\=-\frac{55*3}{6*11} +9= -\frac{5}{2} +9=-2,5+9=6,5.$