Răspuns:
Explicație pas cu pas:
A = (2/3 - 1/2) + 3/4 = (4/6 - 3/6) + 3/4 = 1/6 + 3/4 = 2/12 + 9/12 = 11/12
B = 5/6 + (1 - 3/4) = 5/6 + (4/4 - 3/4) = 5/6 + 1/4 = 10/12 + 3/12 = 13/12
C = 1/3 - (5/6 - 1/2) = 1/3 - (5/6 - 3/6) = 1/3 - 2/6 = 1/3 - 1/3 = 0
D = 1 - (2/5 + 1/10) + 3/10 = 10/10 - (4/10 + 1/10) + 3/10 = 10/10 - 5/10 + 3/10 = 8/10 = 4/5
