Răspuns:
300-175=135
proba:135+175=300
400-175=235
proba:235+175=400
672-175=497
proba:497+175=672
532-175=357
proba:357+175=532
566-175=391
proba:391+175=566
777-175=602
proba:602+175=776
866-175=689
proba:689+175=866
1000-175=825
proba:825+175=1000