Question

4/3 + 7/5 (1/2 + 4/9) - 1/5
a) 221/90
b) 224/90
c) 229/90
d) 227/90
???​

Answer 1

Resposta:

$\dfrac{4}{3} + \dfrac{7}{5} (\dfrac{1}{2} +\dfrac{4}{9} ) - \dfrac{1}{5} = \dfrac{4}{3} + \dfrac{7}{5} (\dfrac{9+8}{18}) - \dfrac{1}{5} = \dfrac{4}{3} + \dfrac{7}{5} (\dfrac{17}{18}) - \dfrac{1}{5}$

$\dfrac{4}{3} + \dfrac{119}{90} - \dfrac{1}{5} = \dfrac{4.30+119-18.1}{90} = \dfrac{221}{90}$