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It is minus 2 hours 28 minutes.
81 minus 86 = -5
if u minus 59 from 81 you get 22
18/27 minus 44/81 is 10/81
1.6531
81 - 15 = 66
81 - 49 = 32
49
136 minus 81 is 55.
29 minus 81 is -52.
The GCF of 49 and 81 is 1.
81 - 78 = 3
81 minus 34 divided by 2 = 64.