Sagot :
Voici 3 solutions à ton problème :
Solution n°1
4 + 1 = 5
10 x 5 = 50
50 + 4 = 54
54 x 9 = 486
Solution n°2
10 + 4 = 14
14 x 4 = 56
1 + 1 = 2
56 - 2 = 54
54 x 9 = 486
Solution n°3
10 + 4 = 14
14 x 4 = 56
56 - 1 = 55
55 - 1 = 54
54 x 9 = 486