Réponse:
a) 1/25= 1/(5)*2=(5)*-2
b) 1/64= 1/8*2=8*-2
c) 1/32=1/2*5=2*-5
d) 1/36= 1/6*2=6*-2
e) 1/-8= 1/(-2)*3= (-2)*-3
f) 4/9= (2/3)*2= (3/2)*-2