Bonjour
a 8/3X-4/5
a = -32/15
b -7/2X1/5
b = -7/10
c _2/3X3/2
c = -6/6 ou -1 j'ai pris le tiret devant le 2 pour 1 moins.
d 7X-1/21
d = -7/21 = -1/3
e 5/6_3/8
= 40/48 - 18/48 = 22/48 = 11/24
f -5/4+7/10
f = -50/40 + 28/40 = -22/40 = -11/20
g _1/6-1/9
g = -9/54 - 6/54 = - 15/54 = - 5/18
h 3/8- -31/20 = 60/160 - 248/160 = - 188/160 = -47/40
