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calculeaza in colonita apoi efectueaza proba prin operatia inversa 385+467 , 650-274 ,438+562 , 703- 96

Răspuns :

385+467=852
650-274=376
438+562=1000
703-96=607

852-467=385
376+274=650
1000-562=438
607+96=703
385+467=852              
650-274=376
438+562=1000
703-96=607
Operatia inversa:
852-467=385
376+274=650
1000-562=438
607+96=703