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  • Utilisateur Brainly
2014-01-05T19:26:54+01:00
A = 2/3 + 3/4 + 5/6 = 27/12 = 9/4

B = 2/3 - 3/4 - 5/6 = -11/12  

C = 2/3 - (3/4 - 5/6) = 9/12 = 3/4.