Réponse :
Bonsoir,
A= (1/2 - 3/4)*(16/9)
A= (2/4-3/4)*(16/9)
A= (-1/4)*(16/9)
A= -16/36 = -4/9
B= (1/5 - 3/10)*(1/6+1/2)
B=(2/10 - 3/10)*(1/6+1/2)
B=(-1/10)*(1/6+1/2)
B= (-1/10)*(1/6 + 3/6)
B= (-1/10)*(4/6)
B= -4/60 = -1/15
Bonne soirée.
" * " = "multiplié"
