Bonjour;
a)
(12/7) /2
=12/7*1/2 = 12/14 = 6/7
b)
3/4 de-5/6
-5/6 * 3/4
= -15/24
= -5/8
1/4 de 28/7
= 1/4*28/7
= 28/28
= 1
1/3 *-1/2
= -1/6
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Bonjour;
a)
(12/7) /2
=12/7*1/2 = 12/14 = 6/7
b)
3/4 de-5/6
-5/6 * 3/4
= -15/24
= -5/8
1/4 de 28/7
= 1/4*28/7
= 28/28
= 1
1/3 *-1/2
= -1/6