Răspuns:
Explicație pas cu pas:
a)
(7/2 + 5/4 + 7/8) : 3 = (28/8 + 10/8 + 7/8) : 3 = 45/8 : 3 = 45/8 * 1/3 = 15/8
b)
(1/2 + 2/3 + 3/4) : 3 = (6/12 + 8/12 + 9/12) : 3 = 23/12 : 3 = 23/12*1/3 = 23/36
c)
(5/3 + 3/4 + 9/8) : 3 = (40/24 + 18/24 + 27/24) : 3 = 85/24 : 3 = 85/24*1/3 = 85/72