Question

РЕШИТЕ УМОЛЯЮ ОЧЕНЬ НАДО​

Answer 1

ПЕРВЫЙ ПРИМЕР:

$7\frac{1}{3} +(-1\frac{2}{9} )*\frac{2}{3} -5\frac{1}{15} *\frac{5}{13} *(1\frac{1}{2})^{2} =\\\\\frac{22}{3} +(-\frac{11}{9} )*\frac{2}{3} -\frac{76}{15} *\frac{5}{13}*(1\frac{1}{2} )^{2} =\\\\-\frac{22}{3} *\frac{9}{11} *\frac{2}{3} -\frac{76}{3} *\frac{1}{13} *(1\frac{1}{2})^{2} =\\\\-2*3*\frac{2}{3}-\frac{76*(1\frac{1}{2} )^{2} }{39} = -2*2-\frac{76*(\frac{3}{2})^{2} }{39}=\\\\-4-\frac{19*3}{13}=-4-\frac{57}{13} = -\frac{109}{13} = -8\frac{5}{13}$

ВТОРОЙ ПРИМЕР:

$-4,5+(-\frac{2}{5})-2,1:(-0,1)=\\\\\frac{9}{2} :(-\frac{2}{5})-\frac{21}{10}:(-\frac{1}{10})= \\\\\frac{9}{2} *\frac{5}{2} +\frac{21}{10} *10=\frac{45}{4} +21=\frac{129}{4}=32\frac{1}{4}$

ТРЕТИЙ ПРИМЕР:

$\frac{1}{3}:(- \frac{2}{3})+ (\frac{5}{9}): (-\frac{4}{3} )=-\frac{1}{2} *\frac{3}{2} +\frac{5}{9} *\frac{3}{4}=-\frac{1}{2} +\frac{5}{3} *\frac{1}{4}=-\frac{1}{2} +\frac{5}{12}=-\frac{1}{12}$