Bonjour 1 Determiner le signe du produit,puis calculer astucieusement
a )-4*(-0,8)*6*(-10)*25
b)0,12*(-2)*(-4)*100*(-20)

calculer astucieusement
A= -11,5*2,5*(-2)*(-3)*(-4)
B=9*(-100)*5*(-20)*(-0,07)
C=0,07*(-5)*(-4)*100*(-20)
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