Jeu 1 :

Mes solutions :

664 = 7+(7+10/5)×(75−2)
664 = 7+(75−10/5)×(7+2)
664 = 7+7+(75−10)×5×2
664 = (7+(75−10)×5)×2
664 = 7+7+10×(75−5×2)
664 = 75×10−(7×(7+5)+2)