1 сравните значения выражений: 7\12+1\24 и 3\7 11\15+7\30 и 3\4 3\16+7\10 и...

$\frac{7}{12} + \frac{1}{24}= \frac{7*2+1}{24}= \frac{15}{24}= \frac{5}{8} = \frac{5*7}{8*7}= \frac{35}{56} \\ \\ \frac{3}{7}= \frac{3*8}{7*8}= \frac{24}{56} \\ \\ \frac{35}{56}\ \textgreater \ \frac{24}{56}$
⇒
$\frac{7}{12} + \frac{1}{24}\ \textgreater \ \frac{3}{7}$

$\frac{11}{15}+ \frac{7}{30}= \frac{11*2+7}{30}= \frac{29}{30} = \frac{29*2}{30*2}= \frac{58}{60}$
$\frac{3}{4}= \frac{3*15}{4*15}= \frac{45}{60} \\ \\ \frac{58}{60}\ \textgreater \ \frac{45}{60}$
⇒
$\frac{11}{15}+ \frac{7}{30}\ \textgreater \ \frac{3}{4}$

$\frac{3}{16}+ \frac{7}{10}= \frac{3*5+7*8}{80}= \frac{71}{80} \\ \\ \frac{3}{10}+ \frac{3}{8}= \frac{3*8+3*10}{10*8}= \frac{54}{80} \\ \\ \frac{71}{80}\ \textgreater \ \frac{54}{80}$
⇒
$\frac{3}{16}+ \frac{7}{10}\ \textgreater \ \frac{3}{10}+ \frac{3}{8}$