Réponses

2014-09-25T14:40:36+02:00
Bonjour

A = 0,4 x 10⁻¹⁰⁺⁹ = 0,4 x 10⁻¹

B = (11/3 -7) : 25/6
B = (11/3 - 21/3) : 25/6
B = - 10/3 x 6/25 = - 60/75 = - 4/5

C = 3/7 - 30/20
C = 3/7 - 3/2
C = 6/14 - 21/14 = - 15/14