Réponses

2013-11-10T18:52:24+01:00
A)7,25x102=(100x7,25)+(2x7,25)=725+14,5=739,5
b)16,8x12-2x16,8=(12-2)x16,8=10x16,8=169
c)(1,5+5)x26=5x26+1,5x26=130+39=169
d)7,9x16,3+7,9x83,7=7,9x(16,3+83,7)=7,9x100=790
2013-11-10T18:53:53+01:00
Bonsoir

a)7,25*102.
a = (7.25 x 100)( 7.25 x 2) = 725 + 14.50 = 739,5

 b)16,8*12-2*16,8
b = 10 x 16,8 = 168

c)(1,5+5)*26
c = 6.5 x 26 = 169

. d)7,9*16,3+7,9*83,7

d = 7.9 x 100 = 790