Réponses

2013-11-04T22:29:12+01:00
A. -7/50+2/75
=-21/150+4/150
=-17/150

b. 1/5+-2/3
=3/15-10/15
=-7/15

c. 1/12-1/9 =
3/36-4/36
=-1/36

d. 4/18+5/27 =
=12/54+10/54
=22/54
=11/27

e.17/-24 + (-5/36)
=-51/72-10/72
=-61/72

 f. 3/16 - -1/12
=9/48+4/48
=13/48

g. 8/-17 - (-1/15)
=-120/255+17/255
=-103/255

 h. 2/5 + -2/15 - 7/12
=24/60-8/60-35/60
=-19/60