Calculați, folosind factorul comun:

a)
[tex] \frac{1}{77} \times ( - \frac{2}{3} ) + \frac{11}{6} \times \frac{1}{77} [/tex]
b)
[tex]( - 0.3) \times \frac{5}{6} + \frac{7}{18} \times 0.3 - 0.3 \times \frac{1}{45} [/tex]
c)
[tex]2 \frac{2}{5} \times ( + \frac{7}{3} ) - ( - \frac{5}{6} ) \times2 \frac{2}{5} [/tex]
d)
[tex] - \frac{2}{9} \times ( - 4 \frac{2}{3} ) - \frac{2}{9} \times ( - \frac{2}{5}) + \frac{2}{9} \times ( - 3 \frac{2}{5}) [/tex]
Vă rog e urgent!​