(1)解：$16+(-25)+24+(-32)$
$=(16+24)+[(-25)+(-32)]$
$=40+(-57)$
$=-17$
(2)解：$(-\frac{1}{3})+(+\frac{1}{2})+(-\frac{2}{3})+(+\frac{4}{5})+(-\frac{1}{2})$
$=[(-\frac{1}{3})+(-\frac{2}{3})]+[(+\frac{1}{2})+(-\frac{1}{2})]+\frac{4}{5}$
$=(-1)+0+\frac{4}{5}$
$=-\frac{1}{5}$
(3)解：$(-5.5)+(+2\frac{3}{4})+(+3.15)+(-\frac{1}{2})$
$=(-5.5)+(-0.5)+2.75+3.15$
$=-6+5.9$
$=-0.1$
(4)解：$(-13)+(+1\frac{3}{4})+(-87)+(+150)+(-1\frac{3}{4})$
$=[(-13)+(-87)]+[(+1\frac{3}{4})+(-1\frac{3}{4})]+150$
$=(-100)+0+150$
$=50$
(5)解：$1.3+0.5+(-0.5)+0.3+(-0.7)+3.2+(-0.3)+0.7$
$=1.3+[0.5+(-0.5)]+[0.3+(-0.3)]+[(-0.7)+0.7]+3.2$
$=1.3+0+0+0+3.2$
$=4.5$
