Réponses

2014-09-09T21:57:43+02:00
* 7 : (28*2/3*2 - 7*3/3*2)
= 7 : ( 56/6 - 21/6)
= 7 : (35/6)
= 6/5 = 1,2

* 2/3 + 5/3 x 9/4
= 2/3 + 45/12
= 8/12 + 45/12
= 53/12

* [ (5-2/3)/3 ] / 4/21
= (13/3) / (4/21)
= 22,75 = 91/4