номер 436, 437 ( прошу с разъяснениями)

436)

1) = 15/24+ 20/24 + 14/24 = 49/24 = 2 1/24


2) = 8/40 + 15/40 - 2/9 = 23/40 - 2/9 = 207/360 - 80/360 = 127/360


3) = 9/36 + 8/36 - 5/36 = 12/36 = 1/3


4) = 15/20 + 16/20 + 1/20 = 32/20 = 1 12/20 = 1 3/5


5) = 27/36 + 15/36 - 4/36 = 38/36 = 1 2/36 = 1 1/18


6) = 8/30 + 12/30 + 21/30 = 41/30 = 1 11/30


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437)

1) = 7/14 + 8/14 - 3/14 = 12/14 = 6/7


2) = 6/30 - 4/30 +1/30 = 3/30 = 1/10


3) = 4/40 + 14/40 - 2/40 = 16/40 = 2/5


4) = 51/60 - 18/60 - 11/60 = 22/60 = 11/30


5) = 6/40 + 28/40 - 3/40 = 31/40


6) = 9/40 + 30/40 - 38/40 = 1/40