Réponses

2014-03-19T15:32:17+01:00
A=-3/8*5/2+13/40
A= -15/16 +13/40
A = -(15*40)/ (16*40) +( 16*13)/( 16*40)
A= - 600/640 +208/640
A= -392 /640
A= - 8*49 / 8*80-----> simplifier
A= -49/80
B=8/3+2/3*5/7
B= 8/3 +10/21
B = 8*7/3*7 +10/21
B= 56 /21 +10/21
B = 66/21
B= 22*3/3*7----> simplifier
B= 22/7