Zad.2/80 zbiór zadań j)5/7 - 1/4 k) 2 3/8 - 1 1/6 l)4 1/2 -2 3/5 m)4 1/4 - 2 2/3 n)5 1/9 - 1 5/6 o)2 1/15 -1/10 p)5 5/13 - 3 1/2
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j) =20/28 - 7/28 = 13/28
k) =2 9/24 - 1 4/24 =1 5/24
l) =9/2 - 13/5=45/10 - 26/10=19/10=1 9/10
m)=17/4 - 8/3 =51/12-32/12=19/12=1 7/12
n)=46/9-11/6 = 92/18 - 33/18=59/18=3 5/18
o) =31/15-1/10=62/30 - 3/30 = 59/30=1 29/30
p)=70/13-7/2=140/26-91/26=49/26=1 23/26