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Ответ

Ответ дан
akunyaastana

Ответ:

 frac{11}{20}  -  frac{5}{12}  =  frac{11 times 3}{20 times 3}  -  frac{5 times 5}{12 times 5}  =  frac{33}{60 }  -  frac{25}{60}  =  frac{8}{60}  =  frac{2}{15}

Пошаговое объяснение:

 frac{8}{9}  +  frac{7}{54}   =  frac{8 times 6}{9 times 6}  +  frac{7}{54}  =  frac{48}{54}  +  frac{7}{54}  =  frac{55}{54}  =  1frac{1}{54}

 frac{5}{6}  -  frac{17}{21}  =  frac{5 times 7}{6 times 7}  -  frac{17 times 2}{21 times 2}  =  frac{35}{42}  -  frac{34}{42}  =  frac{1}{42}

 frac{3}{16}  +  frac{1}{24}   =  frac{3 times 3}{16 times 3}  +  frac{1 times 2}{24 times 2}  =  frac{9}{48}  +  frac{2}{48}  =  frac{11}{48}

 frac{5}{6}  -  frac{22}{27}  =  frac{5 times 9}{6 times 9}  -  frac{22 times 2}{27 times 2}  =  frac{45}{54}  -  frac{44}{54}  =  frac{1}{54}

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