Bonjour
On essaie un peu toutes les solutions :
(18 - 2) x (6 + 12) / 3
= 16 x 16 / 3
= 256 / 3
(18 - 2) x 6 + (12 / 3)
= 16 x 6 + 4
= 96 + 4
= 100
(18 - 2) x (6 + (12 / 3))
= 16 x (6 + 4)
= 16 x 10
= 160
18 - (2 x 6) + (12 / 3)
= 18 - 12 + 4
= 10
18 - ((2 x 6) + (12 / 3))
= 18 - (12 + 4)
= 18 - 16
= 2
18 - (2 x (6 + 12) / 3)
= 18 - (2 x 18 / 3)
= 18 - 12
= 6
(18 - (2 x 6) + 12) / 3
= (18 - 12 + 12) / 3
= 18 / 3
= 6
a) 18 - ((2 x 6) + (12 / 3))
= 18 - (12 + 4)
= 18 - 16
= 2
b) (18 - 2) x (6 + (12 / 3))
= 16 x (6 + 4)
= 16 x 10
= 160
Voilà j'espère avoir pu t'aider ^^