$\frac{2}{5}\times\frac{2}{5}$

$\frac{2}{5}\times\frac{4}{10}$

$\frac{2}{5}\times\frac{1}{2}$

$\frac{2}{5}\times\frac{1}{5}$

$4\div\frac{1}{4}$

$4\div\frac{1}{10}$

$\frac{1}{4}\div4$

$\ frac {1} {10} \ div4$

$16\div\frac{1}{4}$

$\frac{1}{4}\div\frac{1}{6}$

$\frac{1}{4}\div16$

$\frac{1}{6}\div\frac{1}{4}$

$\frac{1}{3}\times\frac{8}{9}$

$1\ \frac{1}{4}\times\frac{1}{10}$

$\frac{5}{4}\times\frac{4}{5}$

$\frac{9}{10}\times\frac{10}{5}$

$\frac{5}{6}\times\frac{5}{6}$

$\frac{1}{2}\times\frac{2}{4}$

$1\ \frac{3}{5}\times\frac{5}{8}$

$\frac{3}{4}\times\frac{5}{3}$

$\frac{1}{4}:\frac{1}{6}$

$\frac{1}{6}\div\frac{1}{4}$

$\frac{1}{6}\div\frac{1}{6}$

$6\div\frac{1}{6}$

כן

לא

אי אפשר לדעת

כן 

לא

אי אפשר לדעת