3. Запишите недостающие числа. <math>1 \(\frac{3}{4}\) + \(\frac{3}{12}\) = \(\frac{\square}{12}\) + \(\frac{3}{12}\) = \(\frac{\square}{12}\) = \(\frac{\square}{12}\)</math> <math>\(\frac{1}{2}\) - \(\frac{1}{3}\) = \(\frac{\square}{6}\) + \(\frac{2}{6}\) = \(\frac{\square}{6}\)</math>

Заполняем пропуски:

$1\; \backslash (\backslash frac\{3\}\{4\}\backslash )\; +\; \backslash (\backslash frac\{3\}\{12\}\backslash )\; =\; \backslash (\backslash frac\{12\}\{12\}\backslash )\; +\; \backslash (\backslash frac\{9\}\{12\}\backslash )\; +\; \backslash (\backslash frac\{3\}\{12\}\backslash )\; =\; \backslash (\backslash frac\{12+9+3\}\{12\}\backslash )\; =\; \backslash (\backslash frac\{24\}\{12\}\backslash )\; =\; 2$

$\backslash (\backslash frac\{1\}\{2\}\backslash )\; -\; \backslash (\backslash frac\{1\}\{3\}\backslash )\; =\; \backslash (\backslash frac\{3\}\{6\}\backslash )\; -\; \backslash (\backslash frac\{2\}\{6\}\backslash )\; =\; \backslash (\backslash frac\{3-2\}\{6\}\backslash )\; =\; \backslash (\backslash frac\{1\}\{6\}\backslash )$