bonjour ,
est ce que vous pouvez me dire si j'ai bon ou non ?svp
A) 7/12+ 4/16+10/24
=2688/4608 + 1152/4608 + 1920 /4608
=5760/4608= 11520/9210 =5/4
b) 45/8 +70/21+4/5
=4725/840 +2800/840 +672/840
= 8197/840 = 11171/120
c) -4/35 - 8/40 +17/28
= -4480/39200 - 7840/39200 + 23800/39200
=11480/39200 = 41/140
d) 43/26 -7/65 -17/26
= 5590/3380 - 664/3380 -2210/3380
=2716/3380 = 679 /845 = 58/65
merci d'avance !