Question

introduceti intregii in fractii:

2,4 supra 7; 3,1 supra cinci; 10,11 supra 15 ; 9,7supra 10; 4,13 supra 20; 143,1supra 45

Answer 1

$2,\frac{4}{7}$ = $\frac{18}{7}$
(numarul de dinaintea liniei de factie il inmultesti cu numarul de jos si apoi aduni numarul de sus)
$3, \frac{1}{5}$ = $\frac{16}{5}$

$10, \frac{11}{15}$ = $\frac{161}{15}$

$9,\frac{7}{10}$ = $\frac{97}{10}$

$4, \frac{13}{20}$ = $\frac{93}{20}$

$143,\frac{1}{45}$ = $\frac{6435}{45}$

:)