Réponses

2014-05-25T11:08:49+02:00
1/2+3/2×7/3 
=1/2+21/6
=3/6+21/6
=24/6
=4

(1/2+3/2)×7/3
=4/2*7/3
=28/6
=14/3

20/9-5/3×2/3
=20/9-10/9
=10/9

(20/9-5/3)×2/3 
=(20/9-15/9)*2/3
=5/9*2/3
=10/27