Bonsoir,
1/2 +1/4
= 2/4 +1/4
=3/4
4/4 -3/4 = 1/4
1/4 -> 70
4/4 -> 70*4
=>280 élèves
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Bonsoir,
1/2 +1/4
= 2/4 +1/4
=3/4
4/4 -3/4 = 1/4
1/4 -> 70
4/4 -> 70*4
=>280 élèves