Question

Calculeaza 3supra7:5aupra4. 10 supra 9: 15supra21

Answer 1

   
[tex]\displaystyle\\ _\texttt{\bf Impartirea a doua fractii se face} \\ _\texttt{\bf inmultind prima fractie cu factia a doua rasturnata.}\\\\ \frac{3}{7} : \frac{5}{4}= \frac{3}{7} \times \frac{4}{5}=\frac{3\times4}{7\times5}= \boxed{\frac{12}{35}}\\\\ \frac{10}{9}: \frac{15}{21} = \frac{10}{9}\times \frac{21}{15} = \frac{10\times 21}{9\times 15}= \frac{2\times 7}{3\times 3}= \boxed{\frac{14}{9}} [/tex]