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(15 2/3-7 1/2):1 1/2=(8 4/6-3/6) : 1 1/2 =8 1/6:1 1/2=49/6:3/2=49/6x2/3=49/9=5 4/9
2x(1/3) do kwadratu+3x(1/2) do kwadratu=2x1/27+3x1/4=2/27+3/4=8/108+81/108=
=89/108
4 1/2x1 1/3-2 2/5x5/7=9/2x4/3-12/5x5/7=6-12/7=6-1 5/7=5 5/7