Bonjour
A= 8/12+5/3
= 2/3+5/3
=2+5/3
=7/3
B= 40/72-1/9
=5/9-1/9
=5-1/9
=4/9
C=15/35+2/7
=3/7+2/7
=3+2/7
5/7
D=5/3-52/39
= 5/3-4/3
=5-4/3
=1/3
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Bonjour
A= 8/12+5/3
= 2/3+5/3
=2+5/3
=7/3
B= 40/72-1/9
=5/9-1/9
=5-1/9
=4/9
C=15/35+2/7
=3/7+2/7
=3+2/7
5/7
D=5/3-52/39
= 5/3-4/3
=5-4/3
=1/3