Réponses

2013-10-28T18:51:24+01:00
Exercice 1 :
a) 3 -  \frac{4}{7}  \frac{1}{2}  \frac{42}{14}  \frac{8}{14}  \frac{7}{14}  \frac{41}{14}

b)  \frac{5}{ \frac{3}{4} + \frac{1}{2} }  \frac{5}{ \frac{3}{4} + \frac{2}{4} }  =  \frac{5}{ \frac{5}{4} } = 5 *  \frac{4}{5}  \frac{20}{5} = 4

c) 3 - 4 *  \frac{2}{7} = 3 -  \frac{8}{7}  \frac{21}{7}  \frac{8}{7}  \frac{13}{7}