ts.<span class="intersentencespace"></span> The set of natural numbers is contained in the set of integers,
which in turn is contained in the set of rational numbers.<span class="intersentencespace"></span> The set of rational numbers is contained in the set of real numbers,
which is contained in the set of complex numbers.
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<p class="noindent">Why do we need so many different sets of numbers?<span class="intersentencespace"></span> Each set of numbers is associated with more and more adv