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b)3/5=9/15 , 5/8=20/24, 4/7=16/28, 9/11=36/44
c)25/100=1/4, 75/21=25/7, 30/18=5/3, 90/54=10/6
d)6/27=2/9, 3/5=6/10, 7/5=28/20, 11/9=55/45
wydaje mi sie że jest dobrze
b)3/5=9/15 , 5/8=20/32, 4/7=16/28, 9/11=36/44
c)25/100=1/4, 75/21=25/7, 30/18=5/2, 90/54=10/6
d)6/27=2/9, 3/5=6/10, 7/5=28/20, 11/9=55/45