Effectuer les produits suivants en regroup=
astucieusement les termes :
A = (-25) x (+32) × (-4) × (-0,1) × (−1)
B= (-11) × (+7) × (−1) × (−10) × (-0,1)
.C= 2 × (-2) x (+10) x 2,5 × (-0,01)
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.D= (-5) x 2 x (+5) x (+0,1) × (-2) × (-7)
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astucieusement les termes :
A = (-25) x (+32) × (-4) × (-0,1) × (−1)
B= (-11) × (+7) × (−1) × (−10) × (-0,1)
.C= 2 × (-2) x (+10) x 2,5 × (-0,01)
●
.D= (-5) x 2 x (+5) x (+0,1) × (-2) × (-7)
●
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Réponse :
bonjour
Explications étape par étape :
A = (-25) x (+32) × (-4) × (-0,1) × (−1)
=-25x-4 x - 0.1x-1 x32
=100x-0.1 x32
=-10x32
=-320
B= (-11) × (+7) × (−1) × (−10) × (-0,1)
-10x-0.1
= 1 x-1 x-11x7
=77
.C= 2 × (-2) x (+10) x 2,5 × (-0,01)
=-4 x 25x-0.01
=-4x-0.25
=1
.D= (-5) x 2 x (+5) x (+0,1) × (-2) × (-7)
=-5x5x2 x-2 x-7x0.1
=-25x-4x-7x0.1
=100x-0.7
=-70