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impartirile corespunzatoare urmatoarelor scaderi:18-6-6-6,30-10-10-10,20-5-5-5-5

Răspuns :

18-6-6-6 = 18 : 3
30-10-10-10 = 30 : 3 
20-5-5-5-5 = 20 :4 
18-6-6-6=0
18:6=3
3x6=18

30-10-10-10=0
30:10=3
3x10=30

20-5-5-5-5=0
20:5=4
4x5=20