(12 + 8) : 2 = 20 : 2 = 10
(12 + 8) : 2 = 12:2 + 8:2 = 6 + 4 = 10
(16 + 8) : 4 = 24 : 4 = 6
(16 + 8) : 4 = 16:4 + 8:4 = 4 + 2 = 6
(10 + 6) : 2 = 16 : 2 = 8
(10 + 6) : 2 = 10:2 + 6:2 = 5 + 3 = 8
(15 + 25) : 5 = 40:2 = 8
(15 + 25) : 5 = 15:5 + 25:5 = 3 + 5 = 8
(9 + 12) : 3 = 21 : 3 = 7
(9 + 12) : 3 = 9:3 + 12:3 = 3 + 4 = 7
(18 + 27) : 9 = 45 : 9 = 5
(18 + 27) : 9 = 18:9 + 27:9 = 2 + 3 = 5
(12 + 8) : 2 = 20 : 2 = 10
(12 + 8) : 2 = 12:2 + 8:2 = 6 + 4 = 10
(16 + 8) : 4 = 24 : 4 = 6
(16 + 8) : 4 = 16:4 + 8:4 = 4 + 2 = 6
(10 + 6) : 2 = 16 : 2 = 8
(10 + 6) : 2 = 10:2 + 6:2 = 5 + 3 = 8
(15 + 25) : 5 = 40:2 = 8
(15 + 25) : 5 = 15:5 + 25:5 = 3 + 5 = 8
(9 + 12) : 3 = 21 : 3 = 7
(9 + 12) : 3 = 9:3 + 12:3 = 3 + 4 = 7
(18 + 27) : 9 = 45 : 9 = 5
(18 + 27) : 9 = 18:9 + 27:9 = 2 + 3 = 5