оооч нужноооо 2. Вычислите: [tex]7 \frac{2}{11} \: x \: 1\frac{8}{9} \: + 1\frac{8}{9} \: x \: 1\frac{9}{11} - 18 \frac{2}{5} [/tex]. Created by graphyara. matematika-ru

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оооч нужноооо
2. Вычислите:
[tex]7 \frac{2}{11} \: x \: 1\frac{8}{9} \: + 1\frac{8}{9} \: x \: 1\frac{9}{11} - 18 \frac{2}{5} [/tex]

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prlkomn

Ответ:

- 1,4

Пошаговое объяснение:

$7\frac{2}{11}*1\frac{8}{9}+1\frac{8}{9} *1\frac{9}{11} -18\frac{2}{5} = \frac{79}{11}*\frac{17}{9}+\frac{17}{9} *\frac{20}{11} -\frac{92}{5} =\\= \frac{1343}{99} + \frac{340}{99}-\frac{92}{5} = - \frac{7}{5} = - 1\frac{2}{5} = -1,4$

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