Выполни вычисления: в) 7 4/19 * 6 1/4 + 4 15/19 * 6 1/4

- в) $7 \frac{4}{19} \cdot 6 \frac{1}{4} + 4 \frac{15}{19} \cdot 6 \frac{1}{4} = \frac{137}{19} \cdot \frac{25}{4} + \frac{91}{19} \cdot \frac{25}{4} = \frac{25}{4} \cdot (\frac{137}{19} + \frac{91}{19}) = \frac{25}{4} \cdot \frac{228}{19} = \frac{25}{1} \cdot \frac{57}{19} = 25 \cdot 3 = 75$ - г) $3 \frac{1}{14} \cdot 17 \frac{7}{29} - 3 \frac{1}{14} \cdot 3 \frac{7}{29} = \frac{43}{14} \cdot \frac{500}{29} - \frac{43}{14} \cdot \frac{94}{29} = \frac{43}{14} \cdot (\frac{500}{29} - \frac{94}{29}) = \frac{43}{14} \cdot \frac{406}{29} = \frac{43}{1} \cdot \frac{29}{29} = 43$ - д) $(1 \frac{1}{2} + 2 \frac{1}{16}) \cdot 4 = (\frac{3}{2} + \frac{33}{16}) \cdot 4 = (\frac{24}{16} + \frac{33}{16}) \cdot 4 = \frac{57}{16} \cdot 4 = \frac{57}{4} = 14 \frac{1}{4}$ - e) $2 \frac{2}{3} \cdot (2 \frac{1}{16} - \frac{1}{3}) = \frac{8}{3} \cdot (\frac{33}{16} - \frac{1}{3}) = \frac{8}{3} \cdot (\frac{99}{48} - \frac{16}{48}) = \frac{8}{3} \cdot \frac{83}{48} = \frac{1}{3} \cdot \frac{83}{6} = \frac{83}{18} = 4 \frac{11}{18}$