Question

РЕШИТЕ!!!
(-2 5/18 - 5 1/12 + 1 2/9)* ( 0,81 : 0,4)

Answer 1

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Вот решение)
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Answer 2

$(-2 frac{5}{18} - 5frac{1}{12} + 1frac{2}{9})* ( 0,81 : 0,4)=-12frac{69}{160} \\ 1)-2frac{5}{18}^{(2}- 5frac{1}{12}^{(3} =-2frac{10}{36}-5frac{3}{36}=-7frac{13}{36}\ \ 2) -7frac{13}{36}+{1frac{2}{9}}^{(4}=-7frac{13}{36}+1frac{8}{36}=-6frac{5}{36}\ \ 3) 0,81:0,4=8,1:4=8frac{1}{10}cdotfrac{1}{4}=frac{81}{10}cdot{frac{1}{4}}=frac{81}{40}=2frac{1}{40} \ \ 4) -6frac{5}{36}cdot2frac{1}{40}=-frac{221}{36} cdotfrac{81}{40}=-frac{1989}{160}=-12frac{69}{160}$