Răspunsuri

2014-10-15T17:40:20+03:00
(52-21)*18= 31 * 18  =558
(52*18) -(21*18) = 936 - 379 = 558
2014-10-15T17:41:54+03:00
Primul mod:31×18=558 Al doile mod:52×18-21×18=936-378=558