Question

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Выполните действие

Answer 1

Остальное не влезло

Answer 2

$3)( - frac{3}{4} - frac{1}{6} ) div ( - 1 frac{3}{8} )$
$- frac{3}{4} - frac{1}{6} = - frac{3 times 3}{3 times 4} - frac{2 times 1}{2 times 6} = - frac{9}{12} - frac{2}{12} = frac{ - 9 - 2}{12} = - frac{11}{12}$
$- frac{11}{12} div ( - 1 frac{3}{8} ) = - frac{11}{12} + ( - frac{1 times 8 + 3}{8} ) = - frac{11}{12} div ( - frac{11}{8} ) = - frac{11}{12} times ( - frac{8}{11} ) = frac{11 times 8}{12 times 11} = frac{88}{132} = frac{2}{3}$


$4)( frac{1}{4} - frac{5}{18} ) times 36$
$frac{1}{4} - frac{5}{18} = frac{9 times 1}{9 times 4} - frac{2 times 5}{2 times 18} = frac{9}{36} - frac{10}{36} = frac{9 - 10}{36} = - frac{1}{36}$
$- frac{1}{36} times 36 = - frac{1}{36} times frac{36}{1} = - frac{1 times 36}{36 times 1} = - frac{36}{36} = - 1$