1 + 8
2 + 7
3 + 6
4 + 5
3 x 3
1 x 9
18/2
10 - 1
11 - 2
IX
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There are many ways, but 5 different ways are: 3/1, 6/2, 9/3, 12/4, and 15/5.
one digit: 5 ways two digits: 5 * 9 ways three digits: 5 * 9 * 8 ways four digits: 5 * 9 * 8 * 7 ways ... ten digits: 5 * 9! ways So if you have to use ten digits, then the answer is 5 * 9! = 1814400. If you can use anywhere from one to ten digits, then the answer is: 5 * (9! + 8! + 7! + 6! + 5! + 4! + 3! + 2! + 1) = 2045565
If you mean 6/9 then the equivalent fractions are 2/3 and 4/6
.009 and .008
8 9/10000