Решите пожалуйста примеры
напишите точное решение,подробно
1)(- 5/12+11/16):(-13/72)
/это дробь
2) ( 9/14-(5/21)):(-2 целых 9/14)

$1)- frac{5}{12} + frac{11}{16} = frac{-20+33}{48} = frac{13}{48} 2) frac{13}{48} :(- frac{13}{72} )= frac{13}{48} *(- frac{72}{13}) =- frac{3}{2} =-1 frac{1}{2} 1) frac{9}{14} + frac{5}{21} = frac{27+10}{42} = frac{37}{42} 2) frac{37}{42} :(-2 frac{9}{14})= frac{37}{42} : (-frac{37}{14} )= frac{37}{42} *(- frac{14}{37} )=- frac{1}{3}$ $==============$ $1)-4 frac{11}{18} -2 frac{7}{12} =-4 frac{22}{36} -2 frac{21}{36} =-6 frac{43}{36} =-7 frac{7}{36} 2)-7 frac{7}{36} :(-3 frac{1}{12} )=- frac{259}{36} :(- frac{37}{12} )=- frac{259}{36} *(- frac{12}{37} )= frac{7}{3} =2 frac{1}{3} 1) frac{7}{16} - frac{31}{40} = frac{35-62}{80} =- frac{27}{80} 2)- frac{17}{24} + frac{27}{40} = frac{-85+81}{120} = -frac{4}{120} =- frac{1}{30} 3)- frac{27}{80} :(- frac{1}{30} )=- frac{27}{80} *(- frac{30}{1} )= frac{81}{8} =10 frac{1}{8}$
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$1)-4,5: frac{9}{14} =- frac{45}{10} * frac{14}{9} =-7 2)-8 frac{2}{9} -(-7)=-8 frac{2}{9} +7=-1 frac{2}{9} 3)-1 frac{2}{9} *2 frac{1}{4} =- frac{11}{9} * frac{9}{4} =- frac{11}{4} =-2 frac{3}{4} 4)-3 frac{3}{4} -(-2 frac{3}{4} )=-3 frac{3}{4} +2 frac{3}{4} =-1$