Réponses

2014-04-29T19:38:24+02:00
Salut :)

A =  \frac{35}{54} x  \frac{36}{35}

A =  \frac{35*6*9}{6*6*35}

A =  \frac{9}{6} =  \frac{3*3}{2*3} =  \frac{3}{2}


B =  \frac{4}{63} x  \frac{63}{8}

B =  \frac{4*63}{63*4*2}

B =  \frac{1}{2}


C =  \frac{4}{63} x  \frac{9}{16}

C =  \frac{4*9}{9*7*4*4}

C =  \frac{1}{28}


D =  \frac{4}{15}  x  \frac{15}{7}

D =  \frac{4*15}{15*7}

D =  \frac{4}{7}


J'espère t'avoir aidé(e) ! :)