a) 6/52 + 8/52 + 4/52 + 2/52 + 16/52 = (6 + 8 + 4 + 2 + 16)/52 = 36/52 = 9/13
б) (19/21 + 1/9) = (19/21 + 7/63) = (57/63 + 7/63) = 64/63 = 1 + 1/63
в) 3/40 + 1/40 + 4/40 + 9/40 + 3/40 = (3 + 1 + 4 + 9 + 3)/40 = 20/40 = 1/2
г) (1/3 - 1/3) + 1/5 = 0 + 1/5 = 1/5
a) 6/52 + 8/52 + 4/52 + 2/52 + 16/52 = (6 + 8 + 4 + 2 + 16)/52 = 36/52 = 9/13
б) (19/21 + 1/9) = (19/21 + 7/63) = (57/63 + 7/63) = 64/63 = 1 + 1/63
в) 3/40 + 1/40 + 4/40 + 9/40 + 3/40 = (3 + 1 + 4 + 9 + 3)/40 = 20/40 = 1/2
г) (1/3 - 1/3) + 1/5 = 0 + 1/5 = 1/5