（填小数）

$24\div \frac {1} {15}\times \frac {1} {18}=$

$\frac {3} {50}\times \frac {5} {9}+\frac {1} {25}=$

$2.4\times \frac {1} {4}\div 0.6=$

$\frac {1} {2}\times 17-7\times \frac {1} {2}=$

$\frac {1} {5}\div \frac {1} {5}\div 2=$