Réponse :
Explications étape par étape
Bonsoir,
Exercice 23
a = 6/18 + 45/18 = 51/18 = 17/6
b= 18/21 -14/21 = 4/21
c= 35/20 - 36/20 = -1/20
d= 21/56 + 8/56 = 29/56
e = -28/12 - 3/12 = -31/12
f= 20/110 - 33/110 = -13/100
Exercice 24
5/6 +3/4 = (5*7)/(6*7) + (3*3) / (14*3) = 35/42 +9/42 = 44/42 = 22/21
Exercice 25
a = 5/10 +14/10 = 19/10
b= 96/ 84 - 49/ 84 = 47/84
c= 20/230 - 253/230 = - 233/230
d= - 27/36 - 28/36 = -55/36
