Răspuns :
247+528=775, 247+637=885, 247+136=383, 247+219=446, 247+605=852, 247+436=683, 247+509=756, 247+247=494.
247+528= 775 247+637= 884 247+136= 383 247+219= 466 247+605 = 852 247+436=683 247+509= 756 247+247=494