Eleven Fingers

Logic Level 3

12345678910=11 \large 1 \, \square \, 2 \, \square \, 3 \, \square \, 4 \, \square \, 5 \, \square \, 6 \, \square \, 7 \, \square \, 8 \, \square \, 9 \, \square \, 10 = 11

There are 29=512 2^9 = 512 ways in which we can fill the squares with +, + , - .

How many ways would make the equation true?

Note: You are not allowed to use parenthesis.

Inspiration.

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