Réponses

  • Utilisateur Brainly
2014-09-03T15:04:25+02:00
A= 19/5 + 4/5 * 7/2
A= 19/5 + (4*7)/(5*2)
A= 19/5 + 28/10
A= 38/10 + 28/10
A= 66/10
A= 33/5

B= 3/5 - 1/5 / (5/2 + 2)
B= 3/5 - 1/5 / 9/2
B= 3/5 - 1/5 * 2/9
B= 3/5 - 2/45
B= 27/45 - 2/45
B= 25/45
B= 5/9