Предмет: Математика, автор: kyrylgrab

7 2/3 + (6-2 4/7) : 2 2/5=?

Ответы

Автор ответа: tatsach
2

Ответ:

Пошаговое объяснение:

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Автор ответа: McProfessor
2

7 \frac{2}{3}  + (6 - 2 \frac{4}{7} ) \div 2 \frac{2}{5}  = 7 \frac{2}{3}  + (5 \frac{7}{7}  - 2 \frac{4}{7} ) \div  \frac{12}{5}  = 7 \frac{2}{3}  + 3 \frac{3}{7}  \times  \frac{5}{12}  = 7 \frac{2}{3}  +  \frac{24}{7}  \times  \frac{5}{12}  = 7 \frac{2}{3}  +  \frac{24 \times 5}{7 \times 12}  = 7 \frac{2}{3}  +  \frac{2 \times 5}{7 \times 1}  = 7 \frac{2}{3}  +  \frac{10}{7}  = 7 \frac{2}{3}  + 1 \frac{3}{7}  = 7 + 1 +  \frac{7 \times 2 + 3 \times 3}{21}  = 8 \frac{14 + 9}{21}  = 8 \frac{23}{21}  = 9 \frac{2}{21}

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