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Sagot :

Réponse:

ex2:

a) 151×47+151×53

=151(47+53)

=151×100

=15100

voilà comment faire pour l'exercice 2

Réponse:

Exercice 1

17×163,5-17×63,5=17(163,5-63,5)=17×100=1700

6×156+6×44=6(156+44)=6×200=1200

151×47+151×53=151(47+53)=151×100=15100

13×2,3+5,7×13=13(2,3+5,7)=13×8=104

32×23,5-3,5×32=32(23,5-3,5)=32×20=640

21×3,4+21×5,4-0,8×21=21(3,4+5,4-0,8)=21×8=168

Exercice 2

2n+6=2(n+3)

7x-56=7(x-8)

5p²-30p=5p(p-6)

26-52a=26(1-2a)

-4t-24=-4(t+6)

-28b²-14b=-14b(2b+1)

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