Question

(7/10-2/5)•(3/4+5/6):6 1/2

Answer 1

Ответ:

Вот, держи))))))))))))

Answer 2

$( frac{7}{10} - frac{2}{5} ) times ( frac{3}{4} + frac{5}{6}) div 6 frac{1}{2}$

решаем по действиям :

$1) frac{7}{10} - frac{2}{5} = frac{7 times 1}{10 times 1} - frac{2 times 2}{5 times 2} = frac{7}{10} - frac{4}{10} =$

$= frac{7 - 4}{10} = frac{3}{10}.$

$2) frac{3}{4} + frac{5}{6} = frac{3 times 3}{4 times 3} + frac{5 times 2}{6 times 2} = frac{9}{12} + frac{10}{12} =$

$= frac{9 + 10}{12} = frac{19}{12} = frac{1 times 12 + 7}{12} = 1 frac{7}{12}.$

$3)1 frac{7}{12} div 6frac{1}{2} = frac{7 + 1 times 12}{12} div frac{1 + 6 times 12}{12} =$

$= frac{19}{12} div frac{13}{2} = frac{19}{12} times frac{2}{13} = frac{38}{156 } = frac{19}{78} .$

$4) frac{3}{10} times frac{19}{78} = frac{3 times 19}{10 times 78} = frac{57}{180} = frac{19}{260} .$

Ответ :

$frac{19}{260} .$