Exercice 2; (Cal) 1. Sans effectuer les calculs, donner le signe des expressions suivantes. Justifier les réponses
A = -3,8 x (-7) x6x5x(-4,7) x 6,1 (-13)
B = 3,3 X (-13) x 53 x (-5,6) (-2) x 0,4
C=-6*(-8) X (-7) (-12) (-8) X (-4) (-1) (-13)​
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