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= 0,45 - 1 1/3 = 9/20 - 1 1/3 = 27/60 - 1 20/60 = 27/60 - 80/60 = - 53/60
(0,45 = 45/100 = 9/20 )
(4,08 - 2,08 : 13/15) * 1,5 =
= (4,08 - 2 2/25 : 13/15) * 1,5 = (0,08=8/100=2/25)
= (4,08 - 52/25 * 15/13) * 1,5 =
= (4,08 - 4/5 * 3/1) * 1.5 =
= (4,08 - 12/5) * 1,5 = (12/5 = 2 2/5 = 2 4/10 = 2,4)
= (4,08 - 2,4) * 1,5 =
= 1,68 * 1,5 = 2,52