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2014-02-19T11:05:31+01:00
Bonjour

Calculer i = (-25)-(+17)-(-13)+(+21) = -25 -17 +13 +21 = 34 - 42 = - 8

 Calculer j = (+14)+(-33)+(-16)+(+42) = 14 -33 -16 +42 = 56 - 49 = + 7

 Calculer k = (-23)+(-31)-(+44)+(-36)-(-28) = -23 -31 -44 -36 +28 = 28 - 134 = - 106

Calculer l = (+18)-(+34)+(-14)-(-27)+(-35)
= 18 -34 -14 +27 -35 = 45 - 83 = - 38