Réponse :
a= 5/3+8/3
=13/3
b=3/8+17/8
=20/8
=5/2
c=5/3*7/2
=35/6
d=7-3/4
=28/4-3/4
=25/4
e=5/8*7/8
=35/64
f=5/3+8/24
=40/24+8/24
=48/24=2
g=(3+7)/(4+7)*(7+15)/(12+8)
=10/11*22/20
=10/11*11/10
=1
h=(8/3+2/3)-(7/18+8/18)
=10/3-(15/18)
=10/3-15/18
=10/3-5/6
=20/6-5/6
=15/6
=5/2
i=2/3+7/3*4/5-1/5
=2/3+28/15-1/5
=10/15+28/15-3/15
=35/15
=7/3