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Calculeaza , apoi verifica :

324+             408+          249-            428-

153                511           132             210




Răspuns :

324+153=477 V: 477-153=324
408+511=919 V: 919-511=408
249-132=117 V: 117+132=249
428-210=218 V: 218+210=428

V:verificare

Succes! ;)