Si possible les réponse svp urgent : Le plus simple possible : A= 1/3+2/4x7/4 B = (2-3/5) x (3/4+1/2)

A= 29/24

B= 7/4
Si tu veux plu de détail demande, mais tu as demandé le plus simple possible

A= 1/3 + 2/4 x 7/4
A= 1/3 + 14/16
A= 1x16/3x16 + 14x3/16x3
A= 16/48 + 42/48
A= 58/48
A= 29/24

B= (2-3/5) x (3/4+1/2)
B= (2/1 - 3/5) x (3/4 + 1/2)
B= (2x5/1x5 - 3/5) x (3/4 + 1x2/2x2)
B= (10/5 - 3/5) x (3/4 + 2/4)
B= 7/5 x 5/4
B= 35/20
B= 7/4