Bonjour
Je crois que c'est ça, un système de soustractions des chiffres
1) 2012 = 1
2-2 = 0
1-0 = 1
0+1 = 1
2)8523 = 2
8-3 = 5
2-5 = -3
5-3 = 2
3) 4752 = 0
4-2 = 2
5-7 = -2
2-2 = 0
4) 2489 = 3
9-2 = 7
4-8 = -4
7-4 = 3
5) 2086 = ?
2-6 = -4
8-0 = 8
-4+8 = 4
