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</p>
<p>That’s not pre-algebra. Those are real number axioms that you learned a long time ago but don’t understand. Try proving them yourself and you’ll see that they’re not that obvious.</p>
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</p>
<p>That’s not pre-algebra. Those are real number axioms that you learned a long time ago but don’t understand. Try proving them yourself and you’ll see that they’re not that obvious.</p>