Réponse:
I = (9/15 +3/10 )÷6/5
= 9/10 ×5/6
=3/2 ×1/2
=3/4
J = 12/7 -407 ×35/12
= 12/7 -5/3
= 1/21
K = (4/5+7/10) ÷ (5/6-5/8)
= 3/2 ÷5/24
=3/2÷24/5
=3×12/5
=36/5
L=6/5+21/5÷14/15
=6/5+21/5×15/14
=6/5+3×3/2
=6/5+9/2
=57/10
bonne chance <33
