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2)
(3 3/5+1,8-1 1/3):1 1/2 =
= (3,6 + 1,8 - 1 1/3) : 1 1/2 =
= (5,4 - 1 1/3) : 1 1/2 = (5 2/5 - 1 1/3) : 1 1/2 =
= (5 6/15 - 5/15) : 1 1/2 = 5 1/15 : 3/2 =
= 75/15 * 2/3 = 25/15 * 2 = 50/15 = 3 1/3