Bonjour,
-5/4 - 7/4 = -12/4 = -(12/2)/(4/2) = -6/2 = -(6/2)/(2/2) = -3/1 = -3
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Bonjour,
-5/4 - 7/4 = -12/4 = -(12/2)/(4/2) = -6/2 = -(6/2)/(2/2) = -3/1 = -3