bonsoir,
Regrouper astucieusement les termes,
puis calculer les expressions suivantes :
A = 2/3 + 5 + 1/3
= 1/3 + 2/3 + 5
= 3/3 + 5
= 1 + 5
= 6
B = 3/4 + 2 + 5/4
= 3/4 + 5/4 + 2
= 8/4 + 2
= 2 + 2
= 4
C = 4/5 + 2/3 + 1/5 + 4/3
= 4/5 + 1/5 + 2/3 + 4/3
= 5/5 + 6/3
= 1 + 2
= 3
D = 11/2 + 3/8 + 5/2 + 1/8
= 11/2 + 5/2 + 3/8 + 1/8
= 16/2 + 4/8
= 8 + 4/8
= 8 + 0,5
= 8,5
