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=-1/9x16/25x(-7 25/100)x13/4=
=-16/225x(-725/100)x13/4=
=-4/9x(-29/25)x13/4=
=116/225x13/4=
=29/225x13=
=377/225=1 152/225
2) (0,15+(-1,15))x(3 3/4+2 7/8)=
=(15/100+(-1 15/100))x(15/4+23/8)=
=15/100+(-115/100)x(30/8+23/8)=
=130/100x53/8=
=65/100x53/4=
=3445/400=8 245/400
Nie wiem czy jest dobrze ale wydaje mi sie ze tak .