Réponses

2013-03-06T15:46:02+01:00

k) 2 -  2/5 = 2/1 - 2/5 = 2x5/1x5 - 2/5 = 10/5 - 2/5 = 8/5

m) 5/3  - 1/6 = 5x2/3x2 - 1/6= 10/6 - 1/6 = 9/6= 3/2

n) 3 x 2/5 = 3/1 x 2/5 = 3x2/1x5 = 6/5

o) -5x  4/15 = -5/1 x 4/15 = - 5x4/1x15 = -20/15 = -4/3