Bonjour, je bloque sur un exercice de maths aidez moi svp Calcule habilement :
(-1) x 1 x (-1) x (-1) x 1 x (-1) x (-1) =
(-2) x (-1) x 5 x 1 x (-1) x (-1)=
0,25 x (-1) x (-4) x (-1) x (-10) x (-1)=
12 x (-135) x (-24) x (-99) x 0 x 12 (-14) =
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