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A) D₁₅∩ D₁₈ c)Complecteti astfel incit sa obtineti o propozitie adevarata 120:18= .........(REST........)

Răspuns :

D15={1,3,5,15}
D18={1,2,3,6,9,18}
D15∩D18={1,3}

c. 120:18=6 rest 12
proba: 120=6*18+12=108+12

a)D15={1,3,5,15}         D18={1,2,3,6,9,18}          D15intersectie cuD18={1,3}       b)120:18=6 rest 66