Aide math exercice 37 merci d avance

Bonjour,

a) -3/2 + 5/3 - 7/2 - 16/3

Il faut mettre chaque fraction sous un dénominateur commun

A = (-3×3)/(2×3) + (5×2)/(3×2) - (7×3)/(2×3) - (16×2)/(3×2)

A = -9/6 + 10/6 - 21/6 - 32/6

A = (-9 + 10 - 21 - 32) / 6

A = (- 30 - 32 + 10) / 6

A = (-62 + 10) / 6

A = -52/6 = -26/3

b) 2 - 5/6 + 5/3 - 2/9

B = (2×18)/18 - (5×3)/(6×3) + (5×6)/(3×6) - (2×2)/(9×2)

B = 36/18 - 15/18 + 30/18 - 4/18

B = (36 - 15 + 30 - 4) / 18

B = 47/18

Bon week-end !