Réponses

2013-04-04T16:40:00+02:00
A) (1/10+(1/2*2/5))
=1/10+2/10
=3/10
B)(1/3*(2/5+3/10))
=1/3*(4/10+3/10)
=1/3*(7/10)
=7/30
C)(41/12-((5/2)*(1/3+5/6)))
=41/12-5/2*(2/6+5/6)
=41/12-5/2*7/6
=41/12-35/12
=6/12
=1/2

.... Les * sont des x (fois)