Bonjour :)
Réponse en explications étape par étape :
- Question : Calculer et donner les résultats sous forme de fractions simplifiées le plus possible :
A = 7/5 + 6/8
A = 7/5 + (3*2)/(4*2)
A = 7/5 + 3/4
A = (7*4 + 3*5)/(5*4)
A = (28 + 15)/20
A = 43/20
B = 5/42 + 7/30
B = (5*5)/(42*5) + (7*7)/(30*7)
B = 25/210 + 49/210
B = (25 + 49)/210
B = 74/210
B = (37*2)/(105*2)
B = 37/105
C = 3/16 + 5/12
C = (3*3)/(16*3) + (5*4)/(12*4)
C = 9/48 + 20/48
C = (9 + 20)/48
C = 29/48
D = 5/16 + 3/4 + 7/12
D = 5/16 + (3*4)/(4*4) + 7/12
D = 5/16 + 12/16 + 7/12
D = (5 + 12)/16 + 7/12
D = 17/16 + 7/12
D = (17*3)/(16*3) + (7*4)/(12*4)
D = 51/48 + 28/48
D = (51 + 28)/48
D = 79/48
E = 1/10 + 5/4 + 5/12
E = (1*4)/(10*4) + (5*10)/(4*10) + 5/12
E = 4/40 + 50/40 + 5/12
E = (4 + 50)/40 + 5/12
E = 54/40 + 5/12
E = (27*2)/(20*2) + 5/12
E = 27/20 + 5/12
E = (27*3)/(20*3) + (5*5)/(12*5)
E = 81/60 + 25/60
E = (81 + 25)/60
E = 106/60
E = (53*2)/(30*2)
E = 53/30
Voilà
