-5/18+(-4/45)=¿?срочно

[latex]- \frac{5}{18} +(- \frac{4}{45} )=- \frac{5}{18} - \frac{4}{45} = \frac{-5*5-2*4}{90} = \frac{-25-8}{90} = \frac{-33}{90} =- \frac{11}{30} [/latex]