Răspuns:
a)
703-275-149=428-149=279
940-385-149=555-149=406
812-537-149=275-149=126
523-98-149=426-149=277
921-643-149=278-149=129
452-79-149=373-149=224
b)
158+197-149=355-149=206
239+586-149=825-149=676
328+396-149=724-149=575
197+495-149=692-149=543
476+359-149=835-149=686
618+293-149=911-149=762