Question

dau coroana.Urgent ex:3
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Answer 1

a)20/3-21/9(simplifici 21/9 cu 3)=20/3-7/3=13/3;

b)21/5-27/15(simplifici 27/15 cu 3)=21/5-9/5=12/5;

c)30/7-36/42(simplifici 36/42 cu 6)=30/7-6/7=24/7;

d)41/6-35/30(simplifici 35/30 cu 5)=41/6-7/6=34/6;

e)31/8-15/40(simplifici 15/40 cu 5)=31/8-3/8=28/3;

f)25/9-28/63(simplifici 28/63 cu 7)=25/9-4/9=21/9.