Bonsoir,
E= 10/18 - 1/6 =
10/18 - 3/18
= 7/18
F= 4 + 7/5
= 20/5 +7/5
= 27/5
G=1+7/3
=3/3 +7/3
= 10/3
H=7/2-2-4/6-1/12
42/12 - 24/12 - 8/12 -1/12
=9/12
= 3/4
K=2/3+4/5-1/2
= 20/30 + 24/30 - 15/30
= 29/30
L=2/3-1/5+7/6
= 20/30 -6/30 +35/30
= 49/30
M=5/18+13/12+2
= 10/36 +39/36 +72/36
= 121/36