Bonsoir
................| A |
.............| B | C |
..........| D | E | F |
.......| -7 | 5 | -2 | 11 |
D = -7 + 5 = -2
E = 5 - 2 = 3
F = -2 + 11 = 9
B = -2 + 3 = 1
C = 3 + 9 = 12
A = 1 + 12 = 13
................| 13 |
.............| 1 | 12 |
..........| -2 | 3 | 9 |
.......| -7 | 5 | -2 | 11 |
................| 5 |
.............| G | H |
..........| J | -3 | K |
.......| -7 | L | -8 | M |
L - 8 = -3
L = 8 - 3 = 5
J = -7 + 5 = -2
G = -2 - 3 = -5
H - 5 = 5
H = 5 + 5 = 10
-3 + K = 10
K = 10 + 3 = 13
M - 8 = 13
M = 13 + 8 = 21
................| 5 |
.............| -5 | 10 |
..........| -2 | -3 | 13 |
.......| -7 | 5 | -8 | 21 |
