Réponse:
A = -1/3 + 5/6 = -2/6 + 5/6 = 3/6 = 1/2 (rouge clair)
B = 3 - 7/9 = 27/9-7/9 = 20/9 (beige)
C = - 2/5 - 3/4 = - 8/20 - 15/20 = - 23/20 (marron clair)
D = 11/7 + 5/3 = 33/21 + 35/21 = 68/21 (rouge foncé )
E = - -4/9 - -10/3 = - -4/9 - -30/9 = 4/9 + 30/9 = 34/9 (blanc)
F = - 4/9 + - 10/3 = - 4/9 + - 30/9 = - 34/9 (jaune)
G = 1/4 + 11/10 = 10/40 + 44/40 = 54/40 = 27/20 (marron foncé )
H = -1/2 + 3/5 + -5/3 = -5/10 + 6/10 + -5/3 = 1/10 + -5/3 = 3/30 + -50/30 = -47/30 (bleu)
I = 2- -2/-3 + 5/7 = 42/21 - -14/-21 + 15/21 = 42/21 - 14/21 + 15/21 = 43/21 (noir)
voilà
