[tex] \frac{1}{10} + \frac{12}{100} + \frac{123}{1000} \\
aducem~la~acelas~numitor,prima~fractie~o~amplificam\\
cu~100,a~doua~cu~10,prima~cu~1.\\
\frac{100}{1000} + \frac{120}{1000} + \frac{123}{1000} =\\
acum~calculam....\\
\frac{220}{1000} + \frac{123}{1000} = \frac{343}{1000} [/tex]
