a)25876+14625=40501 verificarea 40501-14625=25876
162594+25840=188434 verificarea 188434-25840=162594
b)264540-158963=105577 verificarea 105577+158963=264540
82314-8769=73545 verificarea 73545+8769=82314
c)300200-18942=281258 verificarea 281258+18942=300200
100000-25674=74326 verificarea 74326+25674=100000