Bonsoir
Calculer :
A = 7/3 + 11/5
A = (7 x 5)/(3 x 5) + (11 x 3)/(5 x 3)
A = 35/15 + 33/15
A = 68/15
B = 2/7 - 5/9
B = (2 x 9)/(7 x 9) - (5 x 7)/(9 x 7)
B = 18/63 - 35/63
B = -17/63
C = - 5/6 - 7/4
C = (-5 x 2)/(6 x 2) - (7 x 3)/(4 x 3)
C = -10/12 - 21/12
C = -31/12
D = 1/3 + 1/2 + 5/3 + 3/2
D = (1 x 2)/(3 x 2) + (1 x 3)/(2 x 3) + (5 x 2)/(3 x 2) + (3 x 3)/(2 x 3)
D = 2/6 + 3/6 + 10/6 + 9/6
D = (2 + 3 + 10 + 9)/6
D = 24/6
D = (6 x 4)/6
D = 4
E = 7/5 + 13/5 - 3/10 - 7/10
E = (7 x 2)/(5 x 2) + (13 x 2)/(5 x 2) - 3/10 - 7/10
E = 14/10 + 26/10 - 10/10
E = 40/10 - 1
E = (4 x 10)/10 - 1
E = 4 - 1
E = 3
