Question

cine poate sami spuna definiitile fractiilor amplificate, simplificate,adunate,scazute,imultite , impartite

Answer 1

Nu sunt profesor deci nu voi explica ca un profesor dar iti voi zice cum pot:
Amplificare:inmultesti atat numitorul,cat si numaratorul cu cifra cu care ai amplificat,aceasta se foloseste la adunare si scadere cand nu avem acelasi numitor.
                     ex:$^2^) \frac{x}{y} = \frac{2x}{2y}$
                           [tex]a) \frac{2}{7} + \frac{9}{1} = \frac{2}{7} + \frac{9}{7*1} \\\\ ~~~~~~~~= \frac{11}{7} \\\\\\ b) \frac{4}{2} - \frac{3}{5} = \frac{4}{2*5} - \frac{3}{5*2} \\\\ ~~~~~~~~= \frac{1}{10} [/tex]
Simplificarea:imparti numitorul si numaratorul la numarul cu care ai simplificat.
                     ex:[tex] \frac{9}{3} * \frac{3}{6} =\ \textgreater \ \frac{9:3}{3:3} * \frac{3:3}{6:3} \\\\ ~~~~~~=\ \textgreater \ 3* \frac{1}{2} = \frac{3}{2} [/tex]
                          [tex] \frac{2}{4} : \frac{6}{8} = \frac{2}{4} * \frac{8}{6} \\\\ ~~~~~~~= \frac{1}{2} * \frac{4}{6} \\\\ ~~~~~~~= \frac{1}{1} * \frac{2}{6} \\\\ ~~~~~~~= \frac{1}{1} * \frac{1}{3} \\\\ ~~~~~~~= \frac{1}{3} [/tex]