$解:-3\frac{1}{2},0,-(-2),-4,-[+(-5)]的相反数分别为3\frac{1}{2},0,-2,4,-5\ $ $在数轴上表示如图所示\ $
$解:(1)因为|-\frac{2}{5}|=\frac{2}{5}\ $ $|-\frac{3}{7}|=\frac{3}{7}\ $ $\frac{2}{5}＜\frac{3}{7}，$ $所以-\frac{2}{5}＞-\frac{3}{7}$
$解:(2)-(+5.5)=-5.5,-|-4.5|=-4.5，$ $因为|-5.5|=5.5,|-4.5|=4.5,$ $5.5\gt 4.5,$ $所以-(+5.5)\lt -|-4.5|$ $2\frac{3}{4},3.1,2048,65\%,3$ $-9,-2\frac{1}{3},-2\frac{1}{5},-0.28,-15$
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