Matematyka z kluczem kl 5 pod str 59 zad 5 cz 1 pomocy !pilne

A) 351 B) 204 C) 631 D) 2645

7 * x = 2457 x = 2457 : 7 x = 351 7 * 351 = 2457 6 * x = 1224 x = 1224 : 6 x = 204 6 * 204 = 1224 3155 : x = 5 x = 3155 : 5 x = 631 3155 : 631 = 5 x : 23 = 115 x = 115 * 23 x = 2645 2645 : 23 = 115