Réponse :
A = ( -3 ) - ( - 5 ) = ( -3 ) + ( +5 ) = +2
B = ( +3 ) - ( +2 ) = ( +3 ) + ( -5) = -2
C = ( +6 ) - ( -2 ) = ( +6 ) + 2 = 8
D = ( +7 ) - ( -10 ) 17 = +7 + +10 = 17
E = ( -8 ) ( +15 ) = ( -8 ) + 15 = 7
F = ( -2 ) - ( -7 ) = ( -2 ) + 7 = 5
G = ( +14 ) - ( -7 ) = +14 + 7 = 21
H = ( -15 ) - ( -25 ) = ( -15 ) + 25 = 10
I = ( +23 ) - ( +27 ) = +23 + ( -27) = -4
J = ( -18 ) - ( +13 ) = ( -18 ) + (-13) = -31
K = (-28) - (+28) = ( -28 ) + ( -28 ) = -56
L = (-18) - (-24) = ( -18 ) + 24 = 6
Explications étape par étape :