Sagot :
Explications étape par étape
A = 1/3 + 2/3 x 5/2
= 1/3 + 10/6
= 2/6 + 10/6
= 12/6
= 2
B = 1/3 x 2/3 + 5/3
= 2/9 + 5/3
= 2/9 + 15/9
= 17/9
C = 1/3 x 5/2 + 2/3
= 5/6 + 2/3
= 5/6 + 4/6
= 9/6
= 3/2 ( = 1,5 )
D = ( 1/3 + 2/3 ) x 5/2
= 3/3 x 5/2
= 5/2 ( = 2,5 )