C = -2/3 + (-1/3) - (-4/5) + (-2/5)
C = (-2-1)/3 - (-4-2)/5
C = -3/3 - (-6/5)
C = 6/5 - 1
C = 6/5 - 5/5
C = 1/5
Bonne journée.
Bjr
C = (-2/3) + (-1/3) - (-4/5) + (-2/5)
C = -2/3 - 1/3 + 4/5 - 2/5
C = - 3/5
Voilà !
