Calculs simples, additions et soustractions, calcule le plus rapidement possible, tu as 45 secondes

15 + 5 - 2 + 3	=			11 + 12 + 4 - 11	=
13 + 7 - 18	=			22 - 12 + 8 - 3	=
28 + 12 + 5 - 10	=			13 + 8 - 4 - 2	=
11 - 6 + 5 + 5	=			11 + 8 + 6 - 10	=
17 + 3 + 6 + 7	=			43 - 10 - 13 - 5	=