Réponses

  • Utilisateur Brainly
2014-01-04T19:45:05+01:00
45/108 = 15/36 = 5/12
104/140 = 52/70 = 26/35 
150/210 = 75/105 = 25/35 = 5/7

28,7 : 1,4 = 20,5 .

Bonne soirée !
2014-01-04T20:19:16+01:00
45/108
45 =  3 X 3 X 5
108 =  2² X  3 X 3 X 3
45/ 108 =  5 / 12


104/140
104  =  2 X 2² X 13
140 = 2² X 5 X  7
 104/140 = 26 / 35


150/210
150 =  2 X 3 X 5²
210 =  2 X 3 X 5 X 7
150/210 = 5/7


142/7