Автор - aiymhan

решите 7,8,9. заранее спасибо.​

Ответ

Автор - LV0107
7) -15/16-(-9/24) = -45/48+18/48=-27/48=-9/16

 frac{7}{12} - frac{5}{6} = frac{7}{12} - frac{10}{12} = - frac{3}{12} = - frac{1}{4}

2 times frac{1}{4} - ( - 4 times frac{1}{5} ) = 2.25 + 4.2 = 6.65

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