7/12 - 4/15= 39/40 - 13/60= 23/24 - 11/18= 29/30 - 11/40= 11/12 + 9/16= 13/16 - 7/12= 7/10 + 1/12= 5/24 + 9/32= 18/25 - 7/15= rozwiaz i sprowadz do wspolnego mianownika !! na teraz potrzebuje!! :**

19/60 91/120 25/72 83/120 79/48 -13/48 47/60 47/96 19/75

7/12 - 4/15= 19/60 39/40 - 13/60= 91/120 23/24 - 11/18= 25/72 29/30 - 11/40= 83/120 11/12 + 9/16= 1 cala 23/48 13/16 - 7/12= 11/48 7/10 + 1/12= 47/60 5/24 + 9/32= 47/96 18/25 - 7/15= 19/75