17
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To obtain this answer remember that two minus signs together produce a positive answer. For example 3--4 = 7, 25--20=45 etc. Therefore 8--9 = 17 (imagine it as 8+7)
9/8 = 1.125 9/8 = 1.125 9/8 = 1.125 9/8 = 1.125
8/9 is the simplest form
8/9
(2/9) * (8/9) = (2*8) / (9*9) = 16/81 and: 2/9*8/9 = 16/81 2/(9*8)/9 = 1/324 2/(9*8/9) = 1/4 it depends on where you put the brackets
8*9^(4/8) = 8*9^(1/2) which is 8*sqrt(9) = 8*3 = 24