(6 7/12-3 17/36) * 2,5 - (4 1/3) : 0,65 =
(79/12-125/36) * 2,5 - 13/3 : 65/100 =
(237/36-125/36) * 2,5 - 13/3 : 13/20 =
112/36 * 5/2 - 13/3 * 20/13 =
(skracamy 112 i 2 przez 2 oraz trzysnastki) =
64/36 * 5 - 20/3 =
320/36 - 20/3 =
320/36 - 240/36 =
80/36 =
2 i 8/36 = 2 i 2/9
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(6 7/12-3 17/36) * 2,5 - (4 1/3) : 0,65 =
(79/12-125/36) * 2,5 - 13/3 : 65/100 =
(237/36-125/36) * 2,5 - 13/3 : 13/20 =
112/36 * 5/2 - 13/3 * 20/13 =
(skracamy 112 i 2 przez 2 oraz trzysnastki) =
64/36 * 5 - 20/3 =
320/36 - 20/3 =
320/36 - 240/36 =
80/36 =
2 i 8/36 = 2 i 2/9