Réponses

2014-01-03T21:22:02+01:00
M = 2/5-4/3+7/2 .
=12/30-40/30+105/30
=77/30

N = 2/3-5/3×3/2
=2/3-15/6
=4/6-15/6
=-11/6

L = (-7/4 +1/2) ÷ (2/7+ 1/4)
=(-7/4+2/4) : (8/28+7/28)
=-5/4 : 15/28
=-5/4 x 28/15
=- 7/3
 
P = 5/-21
=-5/21