Bonjour,
Calculer les expressions suivantes et donner le résultat sous forme de fraction irréductible
4/3 : (1/6 - 13/5 )
= 4/3 : [(1 x 5) / (6 x 5) - (13 x 6) / (5 x 6)]
= 4/3 : (5/30 - 78/30)
= 4/3 : - 73/30
= 4/3 x - 30/73
= - 120/219
= (3 x - 40) / (3 x 73)
= - 40/73
B=4/7 -2 / -7/8 +1
B = 4/7 - 2 x - 8/7 + 1
B = 4/7 + 16/7 + 1
B = 20/7 + (1 x 7) / (1 x 7)
B = 20/7 + 7/7
B = 27/7
C= 9 - 9/10 * 80/27
C = 9 - 720/270
C = 9 - (90 x 8) / (90 x 3)
C = 9 - 8/3
C = (9 x 3) / (1 x 3) - 8/3
C = 27/3 - 8/3
C = 19/3.
