Réponses

2013-11-23T22:07:56+01:00
A) (-16*10)/150+(3*15)/150=-160/150+45/150=205/150
b) (7*4)/48-(3*12)/48=28/48-36/48=-8/48=1/6
c) (-5*10)/60+(6*3)/60=-50/60+18/60=-32/60=-8/15 ........................bne courage