With the digits 1 up to 9, you must make 100, using the following rules:

Each digit must be used exactly once. The only allowed operation is addition. Two single digits may be combined to form a number (so, for example, 2 and 4 may be combined to 24 or 42). Two single digits may be combined to form a fraction (so, for example, 2 and 4 may be combined to 2/4 or 4/2). HOW MANY POSSIBLE WAYS ARE THERE TO ACHIEVE THIS .

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