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calculati si verificati prin proba 1680:56. si 1680:3


Răspuns :

1680:56=30

proba:30×56=1680

1680:3=560

proba:560×3=1680
1680:56=30
Proba: 30x56=1680
1680:3=560
Proba: 560x3=1680