Jeu 1 :

Mes solutions :

856 = 100×((25+10)×6+4)/25
856 = 6+25×(10+100/4)−25
856 = 6+100×(25+10)/4−25
856 = 100+6+10×(25×4−25)
856 = (100/25+(25+10)×6)×4
856 = (100−25)×10+6+25×4
856 = 25×(25+10)+6−100/4