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Автор - roma7685

Помогите пожалуйста пример оооооочень срочно умоляю дам 40 баллов!!!!

Ответ

Автор - MathDaddy

Ответ:

2.5 + ( - 6 frac{2}{5} ) + ( - 1 frac{2}{15} ) =  \  \ =  2 frac{5}{10}   - 6 frac{6}{15}  - 1 frac{2}{15}   = \  \ =  2 frac{15}{30}  - 6 frac{12}{30}  - 1 frac{4}{30} =   \  \  = frac{75}{30}  -  frac{192}{30}  -  frac{34}{30}  =  \  \  =  -  frac{151}{30}  =  - 5 frac{1}{30}

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