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  1. 791 votes
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  2. 1,348 votes
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  3. 630 votes
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    gabriel commented  · 

    A ruler is so important to mathematics. Why are other things added first before a ruler is added?

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  4. 12 votes
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  5. 5 votes
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  6. 1,410 votes
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  7. 117 votes
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  8. 1,271 votes
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  9. 2,826 votes
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  10. 3,934 votes
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  11. 22 votes
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  12. 2 votes
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  13. 32 votes
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