Réponses

2013-11-17T14:58:04+01:00
A=4/7+3/4+2/7+5/4+1/7
A = (4+2+1)/7 + (3+5)/4
A = 7/7 + 8/4
A = 1 + 2
A = 3
2013-11-17T16:43:09+01:00
a=4/7+3/4+2/7+5/4+1/7
=16/28+21/28+8/28+35/28+4/28
=84/28
=3