Sagot :
Bonsoir,
A = 4/1 - 1/10
A = 3/10
B = 4/9 + 1/27
B = (4 x 3) / (9 x 3) + 1/27
B = 12/27 + 1/27
B = 13/27
C = 8/3 - 1
C = 8/3 - (1 x 3) / (1 x 3)
C = 8/3 - 3/3
C = 5/3
D = 2/3 + 3/4
D = (2 x 4) / (3 x 4) + (3 x 3) / (4 x 3)
D = 8/12 + 9/12
D = 17/12.