《解决问题（一）》口算练习

$12\div \frac {1} {7}=$

$18\div \frac {6} {7}=$

$32\div \frac {8} {9}=$

$1\div \frac {1} {10}=$

$15\div \frac {3} {5}=$

$9\div \frac {18} {17}=$

$20\div \frac {5} {6}=$

$40\div \frac {5} {7}=$

$9\div \frac {5} {8}=$