Question

Quanto é
(7÷9)-10×79=

Answer 1

$(7:9)-10*79= \\ \\ \\ \left( \dfrac{7}{9}\right)- 10*79= \\ \\ \\ \left( \dfrac{7}{9}\right)- 790= \\ \\ \\ \left( \dfrac{7}{9}\right)- \dfrac{790*9}{9}= \left( \dfrac{7-7110}{9}\right)= \boxed{- \frac{7103}{9}}$