aidez moi svp, cest pour demain... merci c'est en 4eme Effectue les calculs suivants en detaillant les etapes: a. -7/50+2/75 b. 1/5+-2/3 c. 1/12-1/9 d. 4/18+5

bonsoir

a = - 21/150 + 4/150 = - 17/150

b = 3/15 - 10/15 - 7/15

c = 3/36 - 4/36 = - 1/36

d) = 12/54 + 10/54 = 22/54 = 1127

e = - 17/24 - 5/36 = -5 1/72 - 10/72 = - 15/72

f = 9/48 - 4/48 = 5/48

g = - 8/17 + 1/15 = -120/255 + 17/255 = - 103/255

h = 2/5 - 2/15 - 7/12 = 24/60 - 8/60 - 35/60 = -19/60